Microscope Parts & Specifications Labeled Diagram - is a microscope

 2024-06-18 13:46:50

Fuji 35/2 very good at all apertures. Database re: Fujifilm lenses agrees w/ my Pro & Con experience. Thanks for publishing the database

Edmund Optics offers a range of laser mirrors for use from the extreme ultraviolet (EUV) to the far IR. Laser mirrors designed for dye, diode, Nd:YAG, Nd:YLF, Yb:YAG, Ti:sapphire, fiber, and many more laser sources are available as flat mirrors, right angle mirrors, concave mirrors, and other specialty shapes. Ultrafast laser line mirrors designed to provide high reflection with minimal group delay dispersion (GDD) for femtosecond pulsed lasers including Er:glass, Ti:sapphire, and Yb:doped laser sources are also available.

Beam shutters are used to control the level of light exposure to an optical lens or lens system in a range of applications such as imaging or microscopy. Shutters are manually or motor controlled irises that may be opened or closed to control the level of light that passes through the aperture. Shutters provide an accurate, stable level of light transmission that may be easily adjusted or maintained for repeated implementation. A number of motorized shutters are also available that include several iris control modes for increased versatility.

Results from a quick test on a Fujinon XC 15-45mm. X-E1 full spectrum and Zomei filters. At 15mm with 720nm and 950nm no hotspot until f22. At 45mm with 720nm hot spot starting at f16 and with 950nm starting at f11

I use Sony A6000, the full spectrum. Tamron 10-24 does not give Hot Spot at all. This is the most suitable lens that I came across! Recommend.

Hey all, i’ve tested the Sony 90mm Macro 2.8 FE G with 550nm and 850nm filters, the hotspot appears only from 5.6 and more Cheers !

i have the 8-18 Panaleica and it’s the best ultra-wide zoom for m4/3 i can find so far. although, there is a huge mild warm spot you’d only notice if you do faux color processing. i have been fixing it in photoshop and it’s less noticeable if you use a 590 or 665nm filter (instead of a 720).

edmund中国

There are other lenses I have tested and to be frank was not impressed. Hot spot issues were not terrible, just not what I was looking for in terms of other results: Hanimar 35/2.8, Pentacon 50/1.8, Fujinon 55/1.9, Miranda 50/1.9, Pentax 35/3.5, Pentax 200/4, Minolta 35/1.8 Rokkor-X, Minolta 135/2.8 Rokkor-X, Olympus 28/3.5, Nikkor 28mm ƒ3.5 Pre-Ai.

Do you allow opening this video at https://youtu.be/a2vCbdIkd6M?si=kXRO8BAyBrJudjBg (which involves sending data to that site)?

Edmund Optics offers blue lasers in the form of solid-state lasers from the Coherent OBIS™ series. Also, we provide violet and blue focusable laser diode modules.

Edmund Optics’ telecentric lenses are available with a range of features for a variety of machine vision or inspection applications. TECHSPEC® GoldTL™ telecentric Lenses feature focus adjustment, along with iris adjustment. TECHSPEC® SilverTL™ telecentric measuring lenses includes iris adjustment in addition to a double telecentric design. TECHSPEC® CompactTL™ telecentric lenses feature compact designs ideal for high volume system integration. TECHSPEC® compactTL™ telecentric lenses are available in in-line models. PlatinumTL™ telecentric Lenses are also available to cover large sensor sizes.

Finally I tested the lens yesterday in a shop with a Hoya R72 and my Nikon D810. With an open apperture there is a slight hot spot, but with smaller ones (I tested 8 and 11) it gets impressive. At the end I didn‘t purchase the lens.

Thanks for the tests. I have also gotten hot spots with the 12-40 but have not tried it at all focal lengths and apertures yet. I am awaiting filters to test the Laowa 7.5. Did you shoot all your lenses wide open or if not, at what apertures and focal lengths?

590nm. It was bad enough that I deleted the pictures in-camera and I won’t have the lens available for several months I’m afraid.

Edmund Optics free-space optical isolators incorporate a Faraday rotator and are specifically designed and manufactured to provide superior performance with high isolation, transmission, and power densities. Each option effectively reduces feedback in the external cavity of diode laser systems and blocks reflections from free-space fiber coupling. These isolators enable state of the art protection for the most stable lasers in the world and are ideal for demanding laser applications.

Nonlinear crystals with 20-10 surface quality and λ/10 (LBO) or λ/8 (BBO) surface flatness provide the broad transparency range and large nonlinear coefficient needed for the harmonic generation of fundamental laser frequencies. Each crystal features a protective anti-reflection (AR) coating that minimizes reflection and limits fogging from ambient conditions.

Panasonic 25mm 1.7 Probably my favorite overall for 590nm. It’s sharp and produces even colors. Above 5.6 it can start to develop a hot spot, but I stick to larger apertures with IR anyway because of diffraction. Shoot mostly at f4 with it, and it’s great. https://www.flickr.com/photos/155370454@N08/52703465063/in/album-72177720306182167/ https://www.flickr.com/photos/155370454@N08/53354625428/in/album-72177720306182137/

However, the Nikkor-NC Auto, 24mm F2.8 lens, all versions, is not a great lens. IR or everyday shooting. If you use that lens on any full frame camera, and compare shots side by side, you’ll see the difference in sharpness on any photograph.

Edmund Optics’ optical manufacturing services include custom design, prototyping, and volume manufacturing of high-quality optical and imaging components and systems. From design to prototype to production, Edmund Optics manufactures over two million optical components and over 175,000 optical assemblies every year.

i’d like to add that i just got an olympus 14-42 II R which shows as a good performer, but don’t agree it’s “good”. there’s a mild correctable hot spot w/720nm filter at f/8, only noticeable when doing faux color processing. you’d never know if you were doing monochrome IR processing.

Well, I had one, so believe me it’s not good, this article it’s only about hotspot, probably is hotspot free, but it’s terrible otherwise…

Edmund Optics provides a breadth of ultrafast optics, including low GDD ultrafast mirrors, highly dispersive ultrafast mirrors, compression prisms, reflective objectives and beam expanders, and nonlinear crystals. These products are designed for common femtosecond lasers, including Ti:sapphire, Yb:doped fiber, thulium (Tm), and holmium (Ho).

Panasonic 42.5mm 1.7 Probably the sharpest I’ve used, but can produce a bit of fringing with false color. Still great though. Similar hot spot issues to the 25mm, so I shoot everything f2.8-5.6. https://www.flickr.com/photos/155370454@N08/52703232044/in/album-72177720306189579/ https://www.flickr.com/photos/155370454@N08/52702456437/in/album-72177720306182167/

I went ahead and purchased this for $125 and it performs like a champ on my 850nm converted 5D Mark III. I sold my Sigma Art 50mm for a couple reasons and one of them was the terrible hot spot.

630nm Filter 1. Nikon z 14-30 f/4 – stay below f/11 2. Nikon z 20 f/1.8 S – stay below f/8 3. Nikon 28-80 f/3.3-5.6G – no hotspots 4. Nikon z 50 f/1. 8 S – stay below f/16 5. Nikon 35-105 f/3.5-4.5 D – no hotspots 6. Nikon 80-200 f/2.8 D ED – no hotspots

Samyang T-S 24mm f3.5 ED AS UMC on converted to full spectrum Canon 50D. Outstanding resolution, no hot spot on every aperture. Perfect for visible and IR spectrum. Tested on visible light, 690nm and 720nm.

Up to f 13/14 nothing then it starts with a very soft hot spot by the 680 and 720 nm filter I could not detect any hotspot up to f 22 with 850 nm The hot spots can be corrected in post

Edmund Optics offers a wide range of analog and digital cameras designed for a variety of imaging applications, including video microscopy or industrial use. Cameras use a wide range of video outputs to display an image on a monitor. Digital cameras are available with a variety of digital interfaces, such as USB 2.0, USB 3.0, FireWire.a, FireWire.b, Gigabit Ethernet, or Camera Link® to ensure maximum compatibility with any number of applications’ needs. A selection of camera accessories is also available including mounting adapters, capture cards, or cables.

Optotune laser speckle reducers remove local interferences and significantly reduce speckle noise in laser systems by dynamically diffusing the laser beam. Offering a compact size, integrated drive electronics, and vibration-less speckle reduction, Optotune laser speckle reducers are ideal for beam homogenization, 3D scanning, metrology, microscopy, and interferometry.

Our compact ultrafast autocorrelator is used to characterize ultrafast laser pulses originating from Ti:sapphire and Yb:doped lasers. Featuring a built-in two-photon absorption (TPA) detector, this autocorrelator is ideal for measuring ultrafast femtosecond and picosecond laser pulses at wavelengths from 700 to 1100 nm. The highly sensitive TPA detector allows for measurements of ultrafast laser pulses with high sensitivity by eliminating the need for angle tuning of the SHG nonlinear crystal.

Probably should boil down to two, at least if we give credit to Roland Vink’s Nikkor Lens Version Database Nikon 85mm f/2.8D PC Micro Nikon 85mm f/2.8D PC-E Micro Both lenses communicate the distance to the body via the contacts, the more recent one has an Electronic Aperture control.

Just looked at my set of test files again and I see no hotspots throughout the range of the 16/2.8 WR. Anecdotally, very happy in use along w/ 23/2, 35/2 & 50/2 WR on X-Pro2 converted to 665nm by Kolari. Limited use of the Laowa 9mm owned by a friend, but nothing jumped out me as an issue. HTH.

Pentax 50/1.4 7 element — Only the 2nd 1.4 that I have ever tested that matches the Konica 57mm. I have also tested two different versions of the Konica and both have same great results. Pentax 35/2 Super-Takumar — big heavy lens that delivers fantastic results. Konica AR 135/3.2 Hexanon – my favorite 135 of all time. This lens is light weight, compact, crazy sharp, and clean hotspot results. Crazy short focus distance, if you love shooting flowers this is an amazing lens. I also bought it for $5 out of a bargain bin! Konica AR 35mm ƒ2.8 – older Hexanon version and excellent results. Konica 28/3.5 Hexanon – Great results some hint of smudging past f11. Konica 200/4 — great results. I love this lens. Konica 200/3.5 — great results Vivitar 200/3.5 m42 — Fantastic lens, great Hot Spot results. Vivitar 19mm/3.5 — Not the sharpest lens in my kit, but clean IR results Canon FL 85/1.8 – a lot to love about this lens other than weight — classic all metal construction, sharp and clean IR results. Canon FD 24/2.8 — some smudging at ƒ11 Canon FD 35/2.8 – very clean results Nikkor 35/2 Pre-Ai, really nice lens with clean results. Nikkor 135/3.5 Pre-Ai, clean lens, just not as sharp as some of my other 135s Voigtlander 35mm ƒ2.5 MC LM — hot spots at ƒ8 Minox Color-Minotar 35mm ƒ2.8 — this is m39 converted from the legendary Minox cameras and it gives great results. Downsides are 4 sided bokeh, and fidgety to use thanks to a tiny aperture ring. Topcor 58mm ƒ1.8 — I have two of these and was not impressed with either. Hotspots start at around ƒ11. YUS (Yashica) 28/2.8 C/Y — this is simply an amazing lens — my hands down favorite 28 for any purpose. YUS (Yashica) 135/2.8 C/Y — next to the Konica 135/3.2 this is the best 135 I have ever tested, sharp, contrasty, and no Hot Spot issues. Yashica 50/1.8 ML C/Y — stay below ƒ11 and watch how you shoot with it.

I remade the fuji xe-2 into a full spectrum. I started having problems after Canon. No lenses! Almost everyone gives a hot spot. Samyang 12/2, Fuji 16-50, Fuji 18 / 2.0 can be used – up to 2.8, 18-55- always a hot spot, Fuji 55-200- ok is always. Sinma 10-20 / 4-5,6 – always a point (starting with a blurred). Canon 17-0 and 18-105 – no until 11! What is sigma 10-20 / 3,5 ????????? Tell me the 10-12-14 mm wide corner !!!!!!!!!!!!!! for fuji. Vladimir, Russia.

Designed for use in a variety of laser and imaging systems, these components are available in a range of micro sizes for integration into a host of OEM applications. Custom sizes, variations in polishing/ ground surfaces and additional coatings are available upon request.

i bought and tried the Konica 57mm f1.4. correct, absolutely no hot spots any any setting. i also needed some wide angle so i also used my zeiss zf-ir 24mm f/2.8 lens and wow, there’s a big noticeable difference in contrast and sharpness without having to pixel peep. not bad, but i want something a little better so you’ll see one for sale on ebay soon.

Thank you for your input. According to this review, Sigma 18-35 is great for infrared. I wouldn’t discredit all Sigma lenses just yet.

Edmund Optics offers a wide range of diode laser sources, including machine vision lasers, life science lasers, metrology lasers, industrial and point lasers, and material processing lasers.

Kolari Chrome Filter 1. Nikon z 14-30 f/4 – be careful at 30mm f/16 2. Nikon z 20 f/1.8 S – stay below f/16 3. Nikon 28-80 f/3.3-5.6G – no hotspots 4. Nikon z 50 f/1. 8 S – no hotspots 5. Nikon 35-105 f/3.5-4.5 D – no hotspots 6. Nikon 80-200 f/2.8 D ED – no hotspots

Tried a few lenses on an APS-C Sony body converted for 720nm. Keep in mind that all but one of these lenses is for full frame, and I’m accounting for that. Results:

Sony Distagon T* FE 35mm f/1.4 ZA Lens is pretty much garbage, you can use it wide open but it still has a hot spot at f/1.4

I would like to see the newer Fuji lenses tested. In my limited trials, I find the Fuji 35mm F2.0 to be an excellent performer, but the autofocus tends to hunt. The 16mm 1.4 is terrible. Autofocus doesn’t work at all. The 90mm is good from 2.0 to 5.6.

I have tested the TAMRON 50-400mm F/4.5-6.3 Di III VC VXD with very good results I have tested 680, 720 and 850 nm From 50 – 400 mm from F 4,5 – 22 with full sunlight from the back what is for my experience the most difficult situation

Tamron 45mm SP f/1.8 Di USD – mild hot spot at f/5.6 and gets very noticeable at f/11-f/16. one of the sharpest lenses i’ve used-too bad it doesn’t work well for IR.

I can add a lens to your list. The Minola MC ROKKOR-PF 58mm f1.4. I just compared it side by side to the Konica 57 f1.4. THEY ARE BOTH COMPARABLY SUPERB. If I had to choose, I’d go with the Minolta. But they’re both very close to perfect.

– Tamron 20-40 f2.8 – Color Hotspots starting at f4 and 680nm / 17-28 has better IR Performance, sharper at 20mm f4 in the corners and a smidge more Contrast. Wanted to exchange the 17-28 – gonna sell the 20-40 again. (tested with Sony a7R III and Filters from AliExpress, Tiffen, Neewer and Urth)

I have used the Olmpus OM 55mm f1.2 with B+W 092 with good results even at f/1.2 also, the Arstat 20mm f2.8 with B+W 092 with good results

Edmund Optics offers a wide range of optomechanics that are ideal for many optical applications. The TECHSPEC optical cage system provides excellent versatility as well as easy assembly of any number of optical system configurations. Kinematic mounts or translation stages are available to ease system adjustment or positioning. A wide selection of optomechanical accessories or adapters is also available to increase system compatibility, modularity, or versatility.

Part of that process, inevitably, is an Allen wrench or two. Allen wrenches (also known as hex keys or hex wrenches) are required for a myriad of fasteners that ...

Does anyone has experience with the Tamron 28-75 mm f/2.8 Di III RXD ? In the DB earlier releases marked as bad performers.

Please note: This list has errors, or you may find lenses listed as “poor” that you use well. That is because this is a compilation from various sources, and people have different judgements for what is acceptable. For example, a lens with a moderate hotspot at f/10—some people may use it primarily at f/6 and below and think it is a fantastic lens. In contrast, someone who uses the lens around f/11 will think it is terrible, while yet another person may use it at f/11 and think the hotspot is mild and can be worked around and still think it’s a good lens. Additionally, hotspots tend to be worse with deeper IR filters, like 850nm, than the color IR filters, like 590nm. Ideally, every lens should specify the aperture range that causes hotspots, but until we get there, please take this list with a grain of salt, and if you find any errors, please let us know and we will fix them!

TECHSPEC® laser mirror substrates are manufactured from high quality fused silica and are designed for use with high power laser sources. These mirrors feature excellent surface specifications, including λ/10 surface flatness and 10-5 surface quality, to limit the possibility of reduced performance due to surface defects. The high surface quality of these mirror blanks also makes them ideal for use in demanding intra-cavity laser applications.

Hello, what about the IR capabilities of the new Fujinon XF16-80 f/4 lens? Is that usable for infrared photography? Kind regards Michael

Our GRIN lenses are designed to provide a 0.55 numerical aperture, and are available with two working distance options. Lenses with a zero working distance are ideal for collimation of single and multi-mode optical fibers and laser diodes because the lens can be positioned and glued directly to the emission source. For focusing applications, or in instances where the lens can’t be in direct contact with the emission source, all lenses are available with a small working distance as well. Each lens is available uncoated (approximately 12% reflection loss), or with a BBAR coating option for R < 0.5%.

I did not include the Nikon 18-35 f/3.5-3.5 D ED nor the Nikon 16-35 f/4 VR in the below results but both showed no hotspots across the ranges. The 70-200mm f/4 VR was also great but did show hotspots with higher apertures (f/16) once above 630nm.

My assortment of lenses falls somewhere between substantial and “all of them”. And I’m very picky about hot spots. I have rejected dozens of lenses listed in the “good” column above. Like I said, I’m picky. So far, I’ve found seven lenses that show only the faintest hot spot photographing a black subject in the middle of a bright field with the lens stopped down AS FAR AS IT WILL GO. Usually f16 or f22. Those seven are……..

Find a tree with full canopy of leaves. Set camera up on tripod and aim center at a sky just above the foliage. I have an Oak that has a nice V shaped area I aim at. You want a cloudless sky – make sure the sun is not in or near the image area. Shade it out if needed. I start at minimum f16-f22 and then work back in full stops while looking through the lens. If you are going to have an issue it will be obvious at smaller apertures. Most lenses with issues lose their spot at around f4-8. If you read my earlier note I have done way to much testing.

After seeing the Minolta 50 f/2.8 AF Macro in the Good column, i got one. It’s sharp but when shooting landscape scenes at f/11, you can see a mild but noticeable hotspot (warmer and brighter) in the center. I’ll keep it for my other color camera (A99ii). I reconfirmed that the Minolta 50 f/1.7 has no hot spots at f/11. color and brightness are even, even when channel swapping. Although, sharpness is not as good as the 50 f/2.8.

Panasonic 14-45mm 3.5-5.6 Not as sharp or contrasty as the 12-60, but still quite good for such a cheap lens. https://www.flickr.com/photos/155370454@N08/53354834645/in/album-72177720312926598/

I should clarify my comment was about the SEL35F18 (the crop lens of 35mm/1.8), rather than the SEL35F18F (the full frame lens with the same specs).

If the MF is not tested on modified IR mirrorless camera, I believe that all MF lens will perform poorly because the IR ray __is designed__ to be focused at the different plane from visible light.

Panasonic 14mm 2.5 Everybody mentions this lens, but I was underwhelmed, and prefer the Oly 17mm 1.8. I didn’t find the sharpness to be on par with the 25mm or 42.5mm lenses, the edges are soft, and colors took more work. But I have read results vary copy to copy. https://www.flickr.com/photos/155370454@N08/52702455382/in/album-72177720306182137/

Zeiss F-Distagon 16 mm C/Y on Canon 5DII full spectrum. Custom converted lens version with internal UV, 590, 720, and 1000 nm filters. Good performer, but with 1000 nm filter the lens does not focus to infinity. However with a bit of stopping down (f/8) the infinity focus is essentially at the hyperlocal distance, so still works. No hotspot even wide open. Extreme corners are a bit softer, as expected from a rectangular fisheye.

What is the best way to test lenses for hot spots, so that I may add my lenses to this database? Do you have a recommended testing routine?

Also, I do have some information on the Nikkor Z 50 1.8 S lens. It followed almost exactly the same pattern as I observed with my Nikkor S 24-70/4. Hot spots stated at f/10, but was almost invisible and did not really change until f/16. And in certain angles from the sun, I saw no hotspots at all in any aperture.

Edmund Optics offers helium–neon lasers from Lumentum with up to 22.5 mW output power and improved stability. They are used in interferometers and metrology, for example.

i get some hot pink in the center when doing faux color at f/11 with a Zeiss 50mm f/2.0 Makro-Planar. i don’t notice it when doing mono IR though. that is probably why it’s in the left/good column.

A wide range of laser accessories is available, including fiber-optic beam collimators and focusers and various kinds of beam expanders.

Hello.. Please.. I can recommend zoom and fixed targets for the Sony a7r II that you have security that do not produce Hotspot…? And Tamron 28-75 mm F/2.8… What do you know?

if anyone knows of an ultra wide zoom for m4/3 that’s relatively sharp with no need for post process fixing of hot spots at any aperture and any focal length (a lot to ask for), please let me know.

Lee, did you get any feedback on the Nikon 28-300 VR? I seriously want to get one for my walk around IR shooting. I suspect it will be like my other better Nikon Zoom lenses… good into you stop down past f/8. I could live with that.

Edmund Optics offers a range of optical tables and breadboards. Both imperial and metric versions are available in a range of dimensions.

850nm Filter 1. Nikon z 14-30 f/4 – stay below below f/6 2. Nikon z 20 f/1.8 S – do not use 2. Nikon 28-80 f/3.3-5.6G – no hotspots 3. Nikon z 50 f/1. 8 S – stay below f/6 4. Nikon 35-105 f/3.5-4.5 D – no hotspots 5. Nikon 80-200 f/2.8 D ED – no hotspots

Edmund Optics offers a wide selection of laser safety products including personal safety equipment and lab safety components. Laser safety eyewear provides CE certified laser radiation protection at wavelengths of common industrial lasers, including Nd:YAG and CO2, with various style and frame options for user comfort. Acrylic laser windows, also referred to as laser viewing windows, provide high visible light transmission and high optical densities at specified design wavelengths, allowing for the safe observance of lasers applications. Lab laser safety components, including laser warning signs and beam traps, are also available.

Edmund Optics offers a wide variety of laser optics, including laser lenses, laser mirrors, laser filters, along with a variety of other components designed for laser use. Laser lenses are designed to focus, homogenize, or shape laser beams. Laser mirrors are ideal for beam steering applications. Laser filters transmit or reflect a portion of the laser light. Laser windows are used to transmit designated wavelengths or protect sensitive components or work areas from stray light.

Mike, I wanted to add my observations using a Z6 and the Nikkor S 24-70/4… First signs of hotspots was at f/10 but was almost invisible and did not really change until f/16. And pointing the camera in some directions (as to where the sun was), I saw no hotspots at all even at the smallest aperture.

Opticscompany

Edmund Optics offers various aspheric lenses, including CNC polished lenses, infrared lenses with diffraction-limited performance, precision glass molded lenses, color-corrected lenses, condenser lenses and plastic molded lenses.

I have tested the Sony 35mm f/1.8 on a full frame Sony (A7 & A7III) @ 850nm and it was really bad. Unusable throughout the range: kolarivision.com//kolarivision.com//www.edwardnoble.com/sony-35-18 There could be a difference on APS-C (I have seen that before), but for me this lens is worse than the Sony/Zeiss 35mm f/2.8 which is already notoriously bad.

alignment lasers, argon ion lasers, aspheric optics, autocollimators, autocorrelators, axicons, ball lenses, beam collimators, collimated beams, laser beams, beam dumps, beam expanders, beam homogenizers, beam profilers, M2 factor, beam shapers, beam shutters, beam splitters, blue lasers, cameras, chirped mirrors, CO2 lasers, cold mirrors, corner cube prisms, custom optics, cylindrical lenses, dielectric mirrors, diffraction gratings, diode lasers, laser safety glasses, Faraday isolators, fiber collimators, fiber optics, fiber-coupled diode lasers, first surface mirrors, gas lasers, gradient-index lenses, green lasers, visible lasers, helium–neon lasers, hot mirrors, infrared optics, infrared light, infrared viewers, integrating spheres, large diameter optics, laser beam characterization, beam parameter product, laser diode collimators, laser diode modules, laser line optics, laser mirrors, laser optics, laser pointers, laser safety, laser speckle, laser viewing cards, lasers, laser light, laser specifications, lenses, focal length, metal-coated mirrors, microscope objectives, microscopes, mirror substrates, mirrors, quarter-wave mirrors, multimode fibers, V number, narrow-linewidth lasers, neutral density filters, nonlinear crystal materials, periodic poling, optical breadboards, optical choppers, optical crystals, optical filters, optical power meters, optical windows, opto-mechanics, parabolic mirrors, plastic optical fibers, polarization beam combining, pulse characterization, light pulses, spectral phase, carrier-envelope offset, red lasers, rod lenses, solid-state lasers, spectrometers, telecentric lenses, transmission gratings, ultrafast optics, ultraviolet optics, waveplates, wedge prisms, yellow and orange lasers

Edmund Optics has a variety of beam expanders, including devices for different wavelength regions (e.g. Nd:YAG and CO2), rotating or non-rotating optics for divergence adjustment and research-grade devices.

I actually bought the FE 85mm 1.8 (not quite for landscape IR purposes) and can testify it actually works pretty well. Made a session with it during sunset, and seem to be OK with very mild hotspot at f/14 and beyond. IMHO f/14 is not the most common use case. So perhaps there are different batches or something. SEL85F18 is the model I have.

Thorlabs

4. Simpler design seems to make for less hot spots. Though that is not always the case. The ƒ1.8-ƒ2 lenses seem at worst to have more of a smudging issue or than the cheap Minolta 50mm ƒ2.

720nm Filter 1. Nikon z 14-30 f/4 – stay below f/8 2. Nikon z 20 f/1.8 S – do not use 3. Nikon 28-80 f/3.3-5.6G – no hotspots 4. Nikon z 50 f/1. 8 S – stay below f/8 5. Nikon 35-105 f/3.5-4.5 D – stay below f/16 6. Nikon 80-200 f/2.8 D ED – no hotspots

Custom optical wedges used to reflect or refract light at precise angles. Available in a variety of deviations, angles, sizes and materials.

I know it’s a long shot, but I really want to know if Fuji’s 2020 updated 10-24 (the WR version) works any better with IR. The original has always been my favorite visible-light landscape lens, but the hotspot is so harsh, it’s unusable at any focal length shorter than 24mm.

I had wanted a little longer reach so I also tried (rented) the Sony FE 24-105 G OSS Lens also This lens should be added to your poor performer list for Sony as it had the hot spots at every setting It looked to me like F4 at 105 mm was the only usable setting.

Edmund Optics offers a variety of fiber optics, including jacketed or unjacketed optical grade or communications grade optical fibers. Optical grade fiber is ideal for general industrial lighting or short distance data transmission. Communications grade fiber is designed for optimal visible light transmission for digital or analog links. Jacketed fiber has increased durability while decreasing stray light. Edmund Optics also offers optical fiber components, including patchcords, collimators, faceplates and image conduits, fiber connectors, and the tools needed for cutting or stripping fibers.

Hello Denns.. I read your article and I think you can get me out of my doubts: I Wanted to buy a Sony A7R II to modify it to full spectrum but I saw in the page of Shop kolariVision… “WARNING: This camera contains an internal diagnostic IR Led. This can cause light leaks when using very long exposures and high ISOs in the H-alpha and IR enabled conversion, in the range of 30 second exposures at 6.400 ISO. Can also have fine horizontal artifacts across the frame in highlighted areas in the IR enabled conversion due to the different sensitivity of some rows of pixels. “… This same text says for the Sony A7 RIII and I would like to ask if the “fine horizontal artifacts ” are greatly appreciated and if they really affect the sharpness… Thank you

Edmund Optics offers the world’s largest inventory of off-the-shelf optical components, which includes an extensive selection of stock optical lenses such as achromatic lenses or aspheric lenses. Many of Edmund Optics’ lenses are offered with a variety of coating options for the ultraviolet (UV), visible, or infrared (IR) spectrum.

590nm Filter 1. Nikon z 14-30 f/4 – no hotspots 2. Nikon z 20 f/1.8 S – stay below f/11 3. Nikon 28-80 f/3.3-5.6G – no hotspots 4. Nikon z 50 f/1. 8 S – no hotspots 5. Nikon 35-105 f/3.5-4.5 D – no hotspots 6. Nikon 80-200 f/2.8 D ED – no hotspots

– the Samyang/Rokinon 12 mm f/2.0 NCS CS has a pretty significant hotspot (tested at f8). It is otherwise sharp. Hyperfocal setting at f8 for infrared is to focus just left of the “0” in “0.5 m” on the focus scale.

Olympus 17mm 1.8 Solid performer and works better at smaller apertures than most others, on the rare occasion they are necessary. Edges aren’t quite as good as the cheap Panasonic primes. https://www.flickr.com/photos/155370454@N08/52703465878/in/album-72177720306189579/

your post about the 24-105mm f4 G lens is a bit confusing. you say hot spots with Sony 16-35mm f2.8 G lens at above f8… does that mean hot spots also start on 24-105mm f4 G at f8? thanks in advance

Mine is great at 830 and f8 on a Nikon D700. It is my go to lens for WA. I have not tried it at 720. Some images show a very minor hotsot at f8

Hi, has somebody experienced VILTROX 23mm f1,4? With my D800 Full Spectrum I use old Nikon lenses (Ais) 28mm shift, 35mm shift, 85mm f1,4 and 105 f 2,5 with no hot spots, expecially in wide apertures; bad use sigma 24mm 1,4, Nikon 85mm f 1,8 AF (sold!). Thanks!

Ball lenses are commonly used to improve signal quality in fiber coupling applications, or for use in endoscopy or bar code scanning applications. Our ball lenses feature short back focal lengths to minimize the distance needed from the ball lens to the optical fiber. Edmund Optics offers a variety of ball lenses in a range of substrates for performance in the ultraviolet to the NIR. Half-ball lenses are also available to ease mounting or system integration.

I rented two Sony lenses last week to use with a newly converted Sony AR7III Camera I had issues with a 24-240 lens before I had consulted your data base.

Edmund Optics offers a range of laser, flat, metal substrate, focusing, or specialty optical mirrors in a multitude of reflective coating options, including protected aluminum, enhanced aluminum, protected silver, protected gold, and dielectric.

The tamron 17-28 f2.8 for sony was excellent and no noticeable hotspots just like the tamron 28-75 I already have. This lens I will buy soon.

Edmund Optics offers a wide variety of microscopy components including microscope objectives, inverted and stereo microscopes, or optical filters that are ideal for use in microscopy setups. Microscope objectives are available in a range of magnifications and include infinity corrected, finite conjugate, and reflective objectives in industry leading brands such as Mitutoyo or Olympus. Microscope objectives are ideal for a range of research, industrial, life science, or general lab applications. Microscopy filters are ideal for isolating specific wavelengths in fluorescence imaging applications.

Edmund Optics offers a wide variety of neutral density filters for ultraviolet (UV), visible and infrared applications. Neutral density filter kits are available, which include a number of filters in a range of optical densities. Stepped ND filters are also available, which offer a number of optical densities on a single filter, ideal for lab or R&D integration.

Edmund Optics offers a wide range of laser sources, including machine vision lasers, life science lasers, metrology lasers, gas lasers, industrial and point lasers, and material processing lasers.

Edmund Optics offers a wide range of transmission and reflection gratings for the ultraviolet (UV), visible and infrared (IR) regions. This includes both ruled and holographic gratings. We also offer polarization gratings, transmission grating beamsplitters and other variants.

Optical grade fiber plastic optics are designed to provide higher transmission in the visible region of the spectrum. They can be used for a wide range of applications, from general industrial light guides to short-distance data transmission. The fiber is tough and flexible but is not designed to bear loads.

Just tested the M4/3 Panasonic 12-32mm F3.5-5.6 and it seems like an excellent lens. No hotspots visible on either end of the focal range up to f20. Tested on a 680nm Panasonic G2.

Edmund Optics offers a wide range of dichroic, crystalline, and wire grid polarizers which can also be used for polarization beam combining.

Edmund Optics offers a wide variety of laser line optics, including laser lenses, laser mirrors, laser filters, along with a variety of other components designed for laser use. Laser lenses are designed to focus, homogenize, or shape laser beams. Laser mirrors are ideal for beam steering applications. Laser filters transmit or reflect a portion of the laser light. Laser windows are used to transmit designated wavelengths or protect sensitive components or work areas from stray light.

The Canon 70-200/4 L non-IS model is in the Good Performer category. I had the IS model and I would put that in the Bad Performer list.

ZEISS 50mm f/2 Planar ZM T* : No problem at all Voigtlander 35mm f/2.5 Color Skopar Leica M mount : No problem at all Just to be more precise about the FUJI XF 27mm f/2.8, it’s usable at f/4 no hot spot visible,it begins to be very faint and wide at f/5.6, very bright small hot spot at f/16. All the tests were done on FUJI X-Pro1 camera.

I can’t understand the loxia 21mm score. Of course, it appears if it is F11 or higher, but it is useful until F8. Also, the resolution itself is really overwhelming.

Has anyone tried Kaxinda 25mm f/0.95 ? the reviews for normal use is good, and it’s quite cheap – 175$ brand new. So i wonder how is it for hotspots

Edmund Optics offers different products for Transmissive Diffraction Gratings, like Transmission Grating that are ideal for In-Line Configurations, UV Transmission Gratings that are ideal for Fixed Grating Applications or Transmission Grating Beamsplitters ideal for Laser Beam Division.

i agree with Steve on the Olympus 12-40/2.8 and will add more specifically, mild hot spots starting around f/8 at 12mm, difficult to correct by f/11. so mild that you may not notice them unless you do faux color processing.

Olympus OM 21mm f/3.5 Auto-W performs well from 660nm and longer wavelengths at f11 or lower without hotspots and very little chromatic fringing at corners at f8 or higher.

yes, the problem too is that i doubt people are testing every focal length on zooms and every aperture and every type of IR filter (590,665,720,850nm). so you’ll only get a general idea from this list but it’s the biggest list i’ve seen. hot spots are the most frustrating part of IR phtography.

I have tested the 21mm (terrible) and the 50m (not too bad). I wouldn’t recommend either however since the Sony / Zeiss 55mm f/1.8 is far better for IR than the Loxia 50mm. I’m still curious about the 85mm because I would like a native mount IR lens in the focal range that takes 49mm filters.

— Sony E 18-55mm f/3.5-5.6 OSS: Hotspot is way worse at 18mm than the chart says. Hot spot starts to become visible at f/5 and is definitely visible at f/5.6. Fine at other points in the zoom range.

And then there’s this one: Nikon 105mm f/2.8G AF-S VR IF-ED For consistency with the rest of the list (all other micro Nikkors are marked as such), it should read Nikon 105mm f/2.8G AF-S VR IF-ED Micro

Luckily, we offer AR-coated conversion filters that reduce hotspots, improving the performance of the lenses on this list. You can generally expect that with the AR coating, you will get several additional hotspot-free apertures, making some of the poor performers usable.

I would like to add to the Fujifilm X lens list another poor performer, the ZEISS Touit 32mm f/1.8 Lens for FUJIFILM X. Sadly, hotspot on most all apertures.

Our general purpose integrating sphere systems are designed to spatially integrate radiant flux in order to measure optical radiation. They can be coupled with a sensor to create radiometers, photometers, or spectroradiometers in order to measure the total geometric flux emanating from a light source or the flux density of an illuminated area. Additionally, these sphere systems can be used to measure the output of high power lasers and laser diodes or to measure the reflectance and transmittance of materials.

Today, I Tested sony a7R3 + SEL20F18G. Unfortunately, this is poor performance. Sadly, there are no alternatives, so we will use them until a replacement lens Discover.

Hello People! Found a new favorite and it’s working great for infrared. Tamron 35-150 2.8/4 I was able to test it finally. Happy to report that no hotpot issues encountered so far. I did some quick tests at different focal lengths and upto f8, and was not able to produce any hotspots. So yep this is my second lens that works great for infrared.

Edmund Optics offers a wide range of diode laser sources, including machine vision lasers, life science lasers, metrology lasers, industrial and point lasers, and material processing lasers.

These are my results regarding hot spots for lenses not in the database using an Olympus E-M5 with an uncoated 720nm conversion. Poor performers: Olympus 8mm f1.8 fisheye Decent performers with mild hot spots: Olympus 12-40/2.8, Laowa 7.5mm f2.0, Olympus 12-50 f3.5/6.3 Excellent performers: Olympus 9mm F8 fisheye body cap (pronounced soft edges), Panasonic Leica 100-400 f4.0-6.3.

I am overall pleased with the Tamron 17-28 f/2.8 I notice some magenta in the vignette corners when using with 590nm and 720nm. On the 850nm the issue is not present or I haven’t noticed.

I just received the new Sony FE 20mm f/1.8 G lens. Bought it for night photography, and checked it also on my Sony A7iii with 590nm IR. Bad hotspot clearly noticeable after f/4. Without overly processing in post, f/4 is the last useful aperture.

– the Zonlai 22 mm f/1.8 appears to have no hotspot, at least shot at f8. Hyperfocal setting for infrared at f8 is to set the focus ring at 1 m (~3ft), and the results are then acceptably sharp to me. For landscape and general city shooting, I basically just do this and don’t even bother to check focus. Manual focus at closer distances and with wider apertures provides detailed results as well (e.g. portrait). I was planning of getting rid of this lens, but it’s now my favorite for IR. It is a bit prone to lens flare though in situations where the sun is positioned very unfavourably.

I started shooting infrared a couple years ago, and wanted to share some findings for anybody that’s also using micro four thirds.

I am planning to have an A7r modified. The information I find in google searches about lenses, however, is inconsistent. I have the Sony 55mm, and it seems to be generally agreed to be excellent at all apertures. I also have the Sony 16-35 (f4) and the 35mm (f 2.8), about which there are conflicting reports. I would like to have a native Sony mount lens, probably 35mm or 28mm but possibly 24mm that has no problem at any aperture. I am looking for a smaller lens (the Sony 35mm, 1.4 is a monster). Something like the Sony 35, 2.8, without the reported limitation. There is a report at Lens Rentals that says the Zeiss lenses are good, but it does not give specifics. If it is good for IR the Loxia 35 would be excellent.

I looked at the Nikon list, and I found some funny lenses: Nikon 70-80 mm f/4.5-5.6 ED AF-D VR Micro NON EXISTENT! Even if ve corrected the focal length to 70-180 mm, there would still be an extra VR (70-180mm Micro-Nikkor has never been produced in the VR version)

Recently used a EF 24-70mm f/2.8L II USM mounted on a 590nm converted 6D. Hotpots were evident starting at f8 and clearly intensified with each stop down. Even at f/8 I had hotspots on some images where ISO and shutter were adjusted for uneven ambient lighting. Just as noted in the Kolari database, this lens is a poor performer.

Edmund Optics offers different kinds of cold mirrors, including versions with 0° and 45° angle of incidence and high performance versions with multi-layer dielectric coatings.

Hi again, So I have just tested out my Hoyar72 77mm filter on the Tamron 24-70 g2 lens, (I taped it onto the 82mm lens and blocked the edges as best as possible.) Pleased to report no visible HotSpots till f22, then of course it’s quite small by then.

Edmund Optics offers a wide range of laser accessories, including different kinds of beam collimators and expanders. In particular, we have fiber-coupled collimators which are suitable for FC/PC, FC/APC and SMA connectors.

Results from a quick test on a Fujinon XC 15-45mm. X-E1 full spectrum and Zomei filters. x = Hotspot f.3.5 f5.6 f8 f11 f16 f22 15mm 720nm x 950nm x 45mm 720nm x x 950nm x x x

White papers and videos are great instruments for creating an interest in your technology and demonstrating the capabilities of a company. But how to publicize them, reaching the right audience?

hI I’ve tried the Olympus 12 40 Pro with EM1 II and Hoya 720 filter : BAD PERFORMER ( Hot spots) Panasonic Leica 8 18 : GOOD PERFORMER ( Clean picture and NO hot spots)

No dis-respect, but take this list with the proverbial grain of salt. Listed above as a “Poor performer” is the Nikkor 24mm F2.8. However, I get excellent results from my Nikkor 24mm, F2.8 on my converted D7000. Now I have the narrow filter, and shoot only in the deep 850 nm range.

Nonlinear crystals of either β-barium borate (BBO) or lithium triborate (LBO) are used for frequency conversion of laser sources. BBO crystals feature thicknesses from 0.2 mm to 0.5 mm to minimize group velocity mismatch and are ideal for frequency doubling or tripling of pulses from Ti:sapphire and Yb-doped lasers. The critical and noncritical phase matching LBO crystals are ideal for second or third harmonic generation of Nd:YAG and Yb-doped lasers. Nonlinear crystals with 20–10 surface quality and λ/10 (LBO) or λ/8 (BBO) surface flatness provide the broad transparency range and large nonlinear coefficient needed for the harmonic generation of fundamental laser frequencies. Each crystal features a protective anti-reflection (AR) coating that minimizes reflection and limits fogging from ambient conditions.

Excellent resource, thank you! The Tamron 24-70 versions are missing, my most used lens. How does one test this best? I could contribute my results.

Edmund Optics offers various kinds of mirrors for ultrafast laser technology, including highly dispersive chirped mirrors for different spectral regions such as 0.8 μm, 1 μm and 2 μm, but also UV and other infrared versions.

Edmund Optics offers a variety of waveplates with crystalline or polymer materials, including multiple order, zero order, or achromatic waveplates. Polymer waveplates offer superior performance over a wider range of incidence angles. Multiple order waveplates are ideal for use with monochromatic light that deviates less than 1% of the waveplate’s design wavelength. Zero order retarders offer high performance over wider wavelength or temperature ranges. Achromatic waveplates offer the most constant performance over the widest wavelength or temperature ranges.

There is a wide range of metal-coated mirrors, including flat and focusing (concave) mirror, off-axis mirrors, specialty mirrors, broadband dielectric mirrors and other infrared mirrors.

IR 720nm filter converted Nikon D7000. I have tested 6 lenses, all of these are hotspot free up to f/8 (no reason to test smaller apertures on crop sensor, f/8 provides huge DoF, everything is in focus for most IR shots). The biggest difference between lenses is sharpness and color. – Sigma 50 Art, the best lens I have tried. No hotspots and very very sharp. Wickedly sharp. – Sigma 105 OS Macro, no hotspots and very sharp. – Sigma 18-35, no hotspots and very sharp. Corners are slightly soft at 18mm, but slightly zoomed in, the lens is sharp corner to corner. – Tamron 10-24 VC, very soft corners at wider angles, from 16-24mm corners are very good with very little softness. Center is very sharp throughout the zoom range. My favorite lens for IR. – Nikkor 18-55 VR1, no hotspots but very soft corners and widest setting, gets better when zoomed in, but overall sharpness is not as good as Tamron 10-24 or Sigma 18-35. – Nikkor 50 f/1,8 AI, no hotspots but soft corners and not as sharp as Sigma 50 Art. – Sigma 10-20 f/4-5,6, no hotspots, soft and as with other lenses, corners are sharper when zoomed in. At first I made custom WB using Tamron 10-24 VC, but when I use Sigma lenses with that WB preset there is slight orange tint, I don’t know how else to explain this, pictures are slightly more flat in contrast compared to those made with Tamron 10-24. When I made custom WB preset for Sigma lenses it was much much better, but Tamron is better again when using the same WB preset, it’s like IR response is much better with that lens. Nikkor 18-55 and 50 AI are as good as Tamron, good IR response and great contrast. Basically if lens 1 is better then lens 2, this behavior translates to IR as well, at least when it comes to sharpness. I was astound when I realized just how sharp Sigma 50 Art is in IR.

Newport

I tested the IRIX 15mm f / 2.4 lens on a nikon D610 FS and there is an important hotspot in the center whatever the setting f/

Edmund Optics offers superpolished laser window substrates where both surfaces have <1 Å r.m.s. surface roughness. The low scatter surfaces are ideal for UV and high power laser applications. We use UV fused-silica substrates with polished bevels and edges. Our in-house manufacturing enables custom versions with dimensions from 6 mm to 76.2 mm and different shapes; the surface roughness can be even <0.5 Å.

Edmund Optics offers various kinds of gas lasers, e.g. helium–neon lasers from Lumentum with up to 22.5 mW output power and improved stability, used in interferometers and metrology, and Coherent Diamond C-Series CO2 lasers.

Rayleigh Length Calculation. Wavelength: Beam waist radius: Beam ...

I tested it on the A7 @ 850nm. It performed better on APS-C however, perhaps because it doesn’t look like a traditional hotspot.

20mm f3.5 Nikon UD. (Their first 20mm) Much better than the 20mm f2.8 Ais. 28mm f3.5 Nikkor-H Pre Ai. Much better than the 28mm f2.8 Ais, an Emarit M, a Zeiss Distagon, and five others. 35mm f2.5 Canon FL. Just about perfect. Easily beat eight contenders including several listed in the “good” column. 40mm f2.8 Canon STM. Just about perfect. 50mm f1.8 Canon STM. Easily beat a whole bunch of other 50’s including several Nikkors, a Planar, and a Summicron M. 57mm f1.4 Hexanon AR. Nearly perfect. An exceptionally clean lens. 58mm f1.4 Minolta MC Rokkor-PF. Just as near perfect as the Hexanon. 85mm f1.8 Canon FD SSC. Not perfect, but very good and better than Nikon f2 Ais, and the Nikon f1.8D.

alignment lasers, argon ion lasers, aspheric optics, autocollimators, autocorrelators, axicons, ball lenses, beam collimators, beam dumps, beam expanders, beam homogenizers, beam profilers, beam shapers, beam shutters, beam splitters, blue lasers, cameras, chirped mirrors, CO2 lasers, cold mirrors, corner cube prisms, custom optics, cylindrical lenses, dielectric mirrors, diffraction gratings, diode lasers, eye protection equipment, Faraday isolators, fiber collimators, fiber optics, fiber-coupled diode lasers, first surface mirrors, gas lasers, gradient-index lenses, green lasers, helium–neon lasers, hot mirrors, infrared optics, infrared viewers, integrating spheres, large diameter optics, laser beam characterization instruments, laser diode collimators, laser diode modules, laser line optics, laser mirrors, laser optics, laser pointers, laser safety equipment and consulting, laser speckle reduction components, laser viewing cards, lasers, lenses, metal-coated mirrors, microscope objectives, microscopes, mirror substrates, mirrors, multimode fibers, narrow-linewidth lasers, neutral density filters, nonlinear crystal materials, optical breadboards, optical choppers, optical crystals, optical filters, optical power meters, optical windows, opto-mechanics, parabolic mirrors, plastic optical fibers, polarization beam combining optics, pulse characterization instruments, red lasers, rod lenses, solid-state lasers, spectrometers, superpolished optics, telecentric lenses, transmission gratings, ultrafast optics, ultraviolet optics, waveplates, wedge prisms, yellow and orange lasers

Just adding some additional Nikon lens hotspot summaries from my recent Nikon z6ii full conversion. I shot about 500 images across an array of lenses using Kolari Chrome, 550, 590, 630, 720 and 850nm filters. These were tested across key aperture ranges and focal lengths.

So i tested the 17-28, 28-75g1 and the 28-200 with 590nm and 760nm on a Sony a7 RIII Full Spectrum, all 3 at 28mm F4, F5.6, F8 and F11.

Your database shows that the OLYMPUS 12-50 has poor performance after f/9. The fact is : ALL 4/3 and micro 4/3 lens start to perform badly after f/8, from Diffraction Limit. No exception.

Nikkor S 24-70/2.8: acceptably mediocre at 2.8 with diffuse, mild hotspot. Unuseable beyond f/4. Focal length is irrelevant.

I’ve got the Fuji 16 F 1.4 – very bad at all apertures past F2.8 and not so good at 2.8 and lower. The only good thing to say about the otherwise wonderful lens is that the hot spot does not have a hard, harsh border, and is very wide – hiding the effect a bit.

I heard nothing but good things about the Minolta 57mm f/1.4 so i got one. it’s true. no hot spots and nice color, but it was not sharp at all. it’s cheaper and easier to just get a point and shoot modified camera if you want this kind of softness.

I can’t believe my favourite IR lens is not listed 🙂 Sony FE 28-70 f3.5-5.6 has no hotspot at all. I’ve used it on my Full Spectrum A7II and I can’t recall that I ran into hotspot like ever. Unfortunately can’t say the same from the Sony FE 24-105 F4 which is quite a bad performer :'(

Our high stability variable frequency optical choppers each include a set of chemically blackened photoetched chopping discs. The mini chopper is an excellent choice for applications requiring a compact package. The chopping discs come in a variety of slot apertures. We also supply lock-in amplifiers.

ZEISS Touit 12mm f/2.8 for Fujifilm X-mount: An excellent performer that I bought to replace the XF 14mm. This is now my primary wide angle lens for IR.

I converted a Sony NEX 5N with SEL1855 that I got on Ebay. Full spectrum conversion and mostly I use IR720 and IR680 filters. At first I thought SEL1855 was performing, then over time I realize it is one giant hot spot at F 3.5 in most cases. You can dial the hot spot from giant covering 2/3 screen from center down to a bright pinpoint at F22. Most daylight shots are highly problematic. You won’t notice sometimes then you look when you get back to the computer and you realize there is a huge brightened circle of light distorting the image. You can avoid the hot spot and make it work on some angles, but when it gets in the way during daylight photos you will have very difficult time. I would suggest a follow up and review this lens again because I have had to look for alternatives and have many many photos with the large glow of the hot spot which is more like a giant hot circle.

edmund中文

Edmund Optics offers argon-ion lasers as ultra-compact units with internal power supply. This line of air-cooled lasers provides a stable, high quality output beam from a rugged yet efficient package. The wavelength options make these lasers ideal for a variety of scientific and OEM applications. The maintenance-free sealed mirror laser tube is ruggedly supported for exceptional resistance to vibrations and rough handling. Embedded dual cooling fans, combined with an exclusive "Dual Channel" airflow design, provide quiet and highly efficient cooling of the laser tube while isolating the state-of-the-art power supply from potential airborne contaminants.

Thank you. Appreciate the reply. I ended up getting a Zeiss Sonnar® T* FE 55 mm F1.8 ZA lens which is great for IR. Still looking for a nice wide angle that is just as great.

Edmund Optics offers a variety of fiber optics, including jacketed and unjacketed optical grade or communications grade optical fibers. Optical grade optical fiber is ideal for general industrial lighting or short distance data transmission. It is designed for optimal visible light transmission for digital or analog links. Jacketed fiber has increased durability while decreasing stray light. Edmund Optics also offers optical fiber components, including patchcords, collimators, faceplates and image conduits, fiber connectors, and the tools needed for cutting or stripping fibers.

Panasonic 12-60mm 3.5-5.6 My favorite zoom I’ve tried. Pretty sharp, good for 590 and 830nm. Was great to at least f8. https://www.flickr.com/photos/155370454@N08/53354602113/in/dateposted-public/

Hot spots noted with Sony 16-35mm f2.8 G lens at above f8; same with Sony 24-105mm f4 G lens & with Zeiss 18mm f2.8mm lens. What a dissappointment.

Our suggestion: place a preview in a suitable encyclopedia article! (That feature is offered as part of our advertising package.) For example, the paper preview shown above would well fit into our articles on laser diodes and diode bars.

Edmund Optics offers high resolution 1550-nm converters for CCD cameras and handheld infrared viewers, apart from simple laser detection products such as laser beam visualizers, IR cards and laser alignment papers.

Cameras and lenses generally weren’t designed for infrared use. Unfortunately, as a result, many lenses suffer from an infrared hotspot. We have compiled the world’s most extensive collection of lenses and their hotspot performance. The lists below are based on our internal tests and what others have reported. Lenses noted with an asterisk (*) have had mixed reports or only have a hotspot in limited situations. Please note: even poor performers can sometimes be used. Most hotspots only occur at smaller apertures and specific shooting angles.

Konica AR 57mm ƒ1.4 – fantastic lens both color and IR. Konica AR 50mm ƒ1.4 – well defined hot spot from ƒ4 Konica AR 50mm ƒ1.7 – clean lens, great performer Konica AR 50mm ƒ1.8 – hot spot looks like smudges in the imager after ƒ11, also Ninja Star Mamiya Sekor 55mm ƒ1.8 SX – clean lens that has smudge Hot Spot after ƒ11 Mamiya Sekor 55mm ƒ1.8 – clean great performer Olympus 50mm ƒ1.4 Zuiko – Ninja Star, and bad hot spot, really bad Olympus 50mm ƒ3.5 Macro Zuiko – lovely performer, sharp and no hot spot Canon FD 50 ƒ1.8 – clean great performer Canon FD 50mm ƒ1.4 – one of the worst from ƒ4 on Minolta MD 50mm ƒ2 – visible hot spot starting at ƒ8 Minolta 50mm ƒ1.7 Rokkor – clean nice lens Minolta MD 50mm ƒ1.7 Rokkor-X – clean great performer Minolta MD 50mm ƒ1.4 Rokkor-PG – terrible hot spot one of the worst starting at ƒ5.6 Minolta 50mm ƒ1.7 AF – clean but the lack of live preview of aperture is a no-go Yashica 50mm ƒ1.5 Yashinon DS-M – Bad, really bad, one of the worst Nikon 50mm ƒ2 Nikkor pre-AI – clean sharp and no hot spot Nikon 50mm ƒ1.4 Nikkor pre-AI – not terrible just unusable after ƒ8 Nikon GN 45mm ƒ2.8 Nikkor – crazy sharp and no hot spot. Fuji 55mm ƒ1.8 Fujinon – Ninja Star, nice lens otherwise with slight smudging at tine apertures Pentax 50mm ƒ1.8 Takumar – No hot spot, but not as sharp or interesting as the Konica/Mamiya/Minolta lenses.

Edmund Optics offers a wide range of industrial and pointing lasers, including visible laser diode modules, DPSS pointing lasers, red and IR alignment laser diodes, violet alignment diodes, compact LDM focusable laser diode modules and others.

– the Sony 35 mm f/1.8 has no hotspot, is sharp and works fine. I mostly don’t use it for IR on account of it living almost full time on the regular camera.

I wan to convert Fujifilm’s X70 Camera to 830nm. Has anyone got practical experience on this, regarding IR Hotspot by its native lens (Fujinon ASPH Super EBC 18.5mm f2.8)?

— Nikon 300mm f/4.5 AI-s (the non-ED one): Completely useless on APS-C. Not sharp at all wide open and diffraction kicks in before it can be stopped down enough to be useful. May be useful on full frame, but I don’t have a converted full frame camera to test it with. Didn’t notice a hotspot though.

The 7artisans 7.5mm f/2.8 fisheye works well enough in the infrared, with slight corner softness and slight color fringing in high contrast. I used f/5.6

Edmund Optics selection of cylinder lenses include achromatic, acylinder, plano-convex, or plano-concave. Achromatic cylinder lenses provide additional color correction by minimizing chromatic aberration. Hybrid acylinder lenses are ideal for color correction, in addition to minimizing spherical aberration. Edmund Optics offers cylinder lenses with glass or plastic substrates, or with circular, rectangular, or oblong dimensions. Multiple anti-reflection coating options are available from the ultraviolet to the infrared, including UV-AR, UV-VIS, MgF2, VIS-NIR, VIS 0°, or NIR I. Edmund Optics offers full prescription data, in addition to 2D or 3D models.

Edmund Optics offers Coherent® Lasercam™ beam profilers as well as an own series of beam profilers, designed to measure a wide range of laser beam sizes, providing information to optimize laser system operation. These laser beam profilers feature high resolution and large area sensors to ensure accurate profiling of both small and large laser beams.

Since I couldn’t find info on these I got to test two newer lenses at a store today and can report on performance (this is on a new full spectrum conversion with pro AR coating on an A7R IV). New Sigma 24-70 f2.8 DG DN lens for sony (l mount is the same): Poor IR performance and noticeable hotspots above f10. It could be worse at lower apertures too I was only looking through the viewfinder outside the store so it was hard to tell, but it was clearly visible at f10 and up so probably not great below either if I had a better environment to test/review. Interestingly my sigma 14-24 DG DN is better for IR from the quick tests I’ve done, but limited to cutting gels in the back.

TECHSPEC® rod lenses are polished on the circumference and ground on both ends. Optical performance is similar to a cylinder lens. Collimated light passing through the diameter of the rod lens will be focused into a line. N-BK7 and UV fused silica substrates are available for a variety of UV, visible and NIR applications.

Fuji 35mm f2 gave me some color shift in the middle at f5.6. Fuji 15-45 works ok. Start to see mild hot spot around f8. Tested on x-t10 full spectrum converted with 590nm/720nm

Now that Kolari Vision is offering AR coating for the sensors the Hoot Spot list will most likely need to be revised for people who get the AR coating.

Hello, I’d keen about what’s wrong with the Canon TS-E 24mm f3.5 L II, listed in bad performers: “Canon TS-E 24 mm f3.5 L II* (see comments for details)”. Cannot find anything in the comments here. Many thanks for your help!

I’ve been adapting lenses onto my Full Spectrum Canon 5D Mark II and found that the Canon 50mm F/1.8 STM has no hot spots with a 590nm lens filter but the Nikon 24mm F/2.8 Ai-S (NIKKOR AIS) appears to hot spot from wide open. I also noticed it flares when I point it towards a fireplace but the flare is gone if I cover the fireplace with the UV/IR cut filter.

Edmund Optics offers a wide variety of spectrometers, including spectrometers that have been optimized for Raman or fluorescence spectroscopy. Raman spectrometers are ideal for Raman applications in the visible to the near infrared. The fluorescence spectrometers are ideal for use in low light fluorescence applications where the ability to detect weak signals is crucial for proper measurement. Additionally, fluorescence spectrometers feature broadband spectral response ranges for detecting wide wavelength bands along with a wide slit width for increased throughput.

I just got testing a Sigma 35mm Art lens on my Kolarivision converted 60D and experience a hot spot at all apertures smaller than F2.8. The intensity increases as the aperture size decreases and is really intolerable at F6.7 or smaller. At apertures wider than F2.8 you really have to look for it.

Edmund Optics offers mounted and unmounted retroreflection prisms in a range coating options. Reflective surfaces are available with reflection coatings including aluminum and silver. Entrance surfaces are available with VIS 0° anti-reflection coatings. Due to their complex shape, mounting a retroflection prism can be difficult. To ease system integration, mounted retroreflection prisms featuring ¼-20 tapped holes are available.

Dec 15, 2022 — Alcohol and distilled water: For particularly stubborn contaminants, a solution of alcohol and distilled water can be used to clean the surface ...

1. The Konica 57mm ƒ1.4 is the only ƒ1.4 that I have tested that has no hot spot at all. Combine that with it’s color performance and despite my best efforts to replace it, I still find it to be a winner.

Viltrox AF 16mm f/1.8 FE Tested on my Full-spectrum Nikon Z5 (with AR coating) and a Kolari 720nm clip-in filter. My conclusion: this lens is not ideal for IR, but it’s pretty usable. At certain angles, or when shooting certain subjects, there is a diffuse bright area in the middle of the frame–very faint at f/1.8, increasing in intensity as you stop down. I mostly shoot at f/5, and it’s quite mild at that aperture. Even at f/16, it’s still less of a “spot” than a hazy light patch–nothing a little burning and dodging in post can’t fix. It may be more of a problem if that bright patch happens to fall in an empty part of the image (like a cloudless sky). I only shoot in black and white–color shooters: be advised that the bright patch has a different color (bluish purple) than the rest of the image (which looks magenta in the RAW files) so the artifact will likely be more pronounced in 720nm color. Finally, this lens is prone to some pretty ugly flare–I don’t always mind flare (it can sometimes add something to an image) but the shapes and patterns this particular lens creates are pretty distracting, so make sure to shield the lens when shooting contre-jour.

I have tried the Sigma 17-50mm f/2.8 EX DC OS HSM Lens and it suffers rather badly produces large hotspots. I would avoid this lens for IR.

Tamron 24-70 is awesome btw. I did not see it listed. Of all the lenses that I own, the 24-70 is the only one that works best for Ir. No hot spots even stopped down, and no issues to report whatsoever.

a few other aditional lensdata not in list, I take ir /uv photo’s since 2008 (modded Nikon D200): Good performers: Tokina ATX Macro 90mm f2.5 ; Tokina 17mm SL f3.5 ; Sigma EX 50mm DG; Sigma EX APo 100-300 f4 ; Sigma 180mm f3,5 APO Macro HSM; Sigma EX 15mm fisheye. Nikkor AIS 105mm f2.5 ; AIS 80-200 f4. E serie 35mm f2.5 also suberb in UV! AI Micro 55mm f3.5. Sigma EX 10-20 f3.5 does well. Samyang 14mm f2.8 UMC, IRIX 15mm f2.4 . Voiglander 40mm Ultron f2 (nikonversion) . BAd performers: Nikkor AIS 28mm f2.8 (with CRC) , Tokina ATX 12-24 f4 dx ,

Hi, I don’t see the Nikon 28-300mm f/3.5-5.6 VR on the list, anyone used it for IR. Any hotspot problems? Thanks in advance. Lee

Edmund Optics offers a wide range of infrared optics, using materials like aluminum, calcium fluoride, fused silica, germanium, magnesium fluoride, sapphire, silicon, zinc selenide, zinc sulfide and other infrared materials.

(A single light source is necessary because the light waves must have identical frequency and phase. The light beam is also considered to be of one color.) Each ...

Hi, I have been using the Nikon 24 – 120mm 3.5 with HOYA R72 filter and when used at f9 there is no hotspot. I bought the Nikon 20mm 1.8 specifically for my Infrared photos as I wanted a sharper lens and Im yet to find an aperture that eliminates the hotspot. Im very disappointed and will now need to sell the lens. I do however own a NIKON 14mm – 24mm 2.8 lens but because my camera is not converted to IR so I need to use the Infrared filter. I have not been able to find a filter to suit anywhere. Does anyone know a solution for this. NISI and NEEWER don’t make the infrared filter and would this work anyway? Any advice??? Mandy Mahn

Edmund Optics offers a variety of optical filters for many applications, including bandpass interference, notch, edge, dichroic, color substrate, or ND. Edmund Optics also offers highly durable hard coatings for applications that require high optical densities with maximum performance.

Will do more tests, but until now I won’t use the 28-200mm at 28mm anymore. terrible AC and almost no Corner Sharpness from F4-F11. But no Hotspots, great IR Performance!

The Edmund Optics’ marketplace is a one-stop shop for the best brands and products in optics and photonics with off-the-shelf products available for same-day shipping and expert technical support via 24/7 chat or by phone or mail. With over 34,000 products from the world’s top optics, imaging, and photonics brands, the Edmund Optics’ marketplace has one of the world’s largest selections of optical components and has been voted the #1 preferred supplier of optical components for fourteen years in a row.

Edmund Optics offers the world’s largest inventory of off-the-shelf optical components. The majority of Edmund Optics’ light pipes are hexagonal in shape, which leads to 35% less light loss than for comparable square light pipes. Fused silica light pipe homogenizing rods are ideal for applications utilizing UV LED light sources. Tapered light pipe homogenizing rods offer several magnification options, including 2× or 3×. Edmund Optics offers light pipe mounts for either tapered or hexagonal light pipes, designed to offer easy system integration solutions, or to ease handling.

Rokinon 24mm tilt-shift with full-frame Sony e-mount. No hotspots observed at all. Sony 70-300 G in full-frame Sony e-mount. Nasty hotspots at wide end, OK at 300 with widest aperture.

Fujifilm XF 23mm F2 R WR: An excellent performer, I’ve never encountered hot spots under normal shooting conditions. This is my default lens for most IR situations.

I have a Canon 5D Mark III that’s converted to Kolari 850nm monochrome and was looking for a substitute for my Sigma 50 Art. I bought the Canon EF 50mm f/1.8 STM and I haven’t had any issues with it. I also use it on my non-IR Mark IV bodies with great success. It’s surprisingly good for $125. 🙂

Edmund Optics offers fiber-optic collimators for FC/PC, FC/APC and SMA connectors and different wavelength ranges around 350 nm to 1600 nm.

edmund读音

Edmund Optics offers plate, cube, pellicle, polka dot, and specialty prism beamsplitters in a variety of anti-reflection coatings or substrates. Standard beamsplitters, which split incident light by a specified ratio that is independent of wavelength or polarization state, are ideal for illumination subassemblies or as one way mirrors. Dichroic beamsplitters, which split light by wavelength, are often used as laser beam combiners or as broadband hot or cold mirrors. Non-polarizing beamsplitters, ideal for laser beam manipulation, split light by overall intensity. Polarizing beamsplitters, often used in photonics instrumentation, split light by polarization state. Edmund Optics’ anti-reflection coatings are designed for the ultraviolet (UV), visible, or infrared (IR).

Edmund Optics offers different kinds of green lasers, including argon-ion lasers, diode lasers and diode-pumped solid-state lasers.

Fujifilm XF 50mm f/2 R WR: The best performer WRT hot spots on X-mount in my experience. You may be able to force one artificially but I’ve tried and have failed thus far.

You have it marked as good, but I’m getting large but faint hot spots from a Tamron 15-30 at mid-apertures on a converted D3300.

Edmund Optics is a premier supplier of UV optics including mirrors, lenses, filters, and beam expanders. We work with ISO 9001 certified and MIL-spec quality systems, and use a wide range of metrology including interferometers, cavity ring-down (CRD) spectrometers, Shack–Hartmann wavefront sensors, profilometers, and coordinate measurement machines (CMMs). We provided guaranteed laser damage threshold specifications.

Olympus 40-150mm 2.8 and 12-40mm 2.8 pros Both are sharp and contrasty but both develop hot spots as you move past f5 or so, and the edges aren’t the best especially at the wide ends. But if you like shooting at f2.8-4 or so they can get good shots, at the long ends particularly. https://www.flickr.com/photos/155370454@N08/52702979711/in/album-72177720306182137/ https://www.flickr.com/photos/155370454@N08/52703398775/in/album-72177720306182137/

On or Sony A7S the 24-240 lens produces hot spots most of the time. They can be corrected in Lightroom and Photshop, but it is annoying. Sony lenses generally has this problem.

I also tested the Tamron 28-200mm A071SF F/2.8-5.6 Di III RXD für Sony E-Mount It is a very good lens for IR, I could not recognize any hotspot on no focal length or aperture This in now my referred lens and replace my old Minolta 28-85 mm what is also hot spot free

The boy, dressed as a Buddhist monk, bends the spoon just by looking at it. When Neo approaches him to learn the secret, the boy tells him that in order to bend ...

Coherent® Diamond C-Series CO2 lasers offer reliability with more than 50,000 operating hours, along with superior beam quality and stability. These lasers are ideal for a wide range of applications from marking and engraving to material processing. They are a compact option with an integrated RF power supply. Maximum output power ranges from 20 to 40 watts, and can be controlled through pulse width modulation (PWM).

From design to prototype to production, Edmund Optics manufactures over 2 million optical components every year, manufactures over 175.000 optical assemblies including imaging lenses, laser beam expanders or microscope objectives and provides in-house expertise and metrology to support your custom manufacturing. Edmund Optics’ engineers can design and manufacture fully-custom components, build-to-print following customer-supplied designs, and quickly modify any of our thousands of off-the-shelf optics sold in our Marketplace.

Laser beam analysers from Edmund Optics include devices such as profiler systems that evaluate data from beam images to provide information such as beam location, peak intensity position, stability, or beam density. For example, there are different kinds of laser beam profilers and autocorrelators for ultrashort pulse characterization.

I find that Nikkor 17-55 has hot spots over f/5.6 or on times over 20 sec. The same with Nikkor 18-55 VR II but definitely less visible hot spots on this lens.

Edmund Optics is shown as alternative supplier on 1089 pages of other suppliers offering the same kind of products without having our advertising package.

550nm Filter 1. Nikon z 14-30 f/4 – no hotspots 2. Nikon z 20 f/1.8 S – stay below f/11 3. Nikon 28-80 f/3.3-5.6G – no hotspots 4. Nikon z 50 f/1. 8 S – no hotspots 5. Nikon 35-105 f/3.5-4.5 D – no hotspots 6. Nikon 80-200 f/2.8 D ED – no hotspots

i’d like to add to the list: olympus 12-100 f/4 (very bad hot spots) leica 8-18 f/2.8-4 (no hot spots) leica 12mm f/1.4 (no hot spots)

What is Suprasil 300 material? Suprasil 300 is a high purity synthetic fused silica material manufactured by flame hydrolysis that combines excellent physical ...

Norland Optical Adhesive 72. PDF document icon Norland Optical Adhesive 72.pdf — PDF document, 57 KB (59210 bytes). © University of Louisville.

Hallo Ich weiß nicht,ob ohne “Hotspot” oder? Nur neu Nikon AF-S Nikkor 16-80mm F2. 8-4.0 E ED VR 72mm??? Aber nur sehr gut frei “Hotspot” Alt nur Nikon AF-S DX Nikkor 16-85mm F3. 5-5.6 ED G VR 67mm!

So I suspect the poor rep is based on the N or the NC version. This manual focus lens is still made new today. if any of you still want to dump one off cheap, just let me know. 🙂

Edmund Optics offers various fiber-coupled diode lasers, including visible and infrared emitters with high brightness fiber output, frequency-stabilized laser diodes, class IV high-power devices, Coherent® Diamond FLQ-Series fiber lasers and Coherent®high performance OBIS™ LX/LS fiber-pigtailed laser systems.

For DeFender TX and DeFender iGLOW® TX.

Tamron 17-35mm f/2.8-4 DI OSD at f/5.6 on Nikon D810 with 82mm HOYA R72 IR 720nm: no hot spot. Didn’t test at smaller apertures. f/2.8 @17mm and f/5.6 @35mm being the sharpest apertures for this zoom lens.

Edmund Optics offers an extensive selection of large diameter optics including achromatic lenses or aspheric lenses. Many of Edmund Optics’ lenses are offered with a variety of coating options for the ultraviolet (UV), visible, or infrared (IR) spectral range.

Edmund Optics offers a wide range of measuring tools suited for many optical measurement needs. Measuring gauges offer precise, easy-to-use measurement capabilities in a range of different sizes or types including calipers or micrometers. Spherometers are extremely specialized measurement tools that determine the surface radii of convex or concave objects. Standards tables are also included for quickly referencing radii information.

Edmund Optics offers various specialty mirrors, including hot mirrors which reflect 90% of NIR and IR light. We also have extended hot mirrors with improved NIR reflectance and high performance versions with an optimized multi-layer dielectric coating.

If you want a great laptop to accomplish everyday laptop tasks, get an ultrabook. Ultrabooks are powerful, thin-and-light laptops with long battery life, which ...

Edmund Optics offers stereo microscopes and inverted microscopes by industry leading manufacturers, including Mitutoyo and Olympus. The Mitutoyo FS70 inspection microscope is compatible with the Mitutoyo infinity corrected objectives. The Olympus stereo microscopes offer various mounting configurations for a variety of application and system spaces. Edmund Optics also offers a variety of stereo microscope accessories, including cameras or vibration isolation tables which minimize vibrations from interfering with image quality.

Optical components

Has anyone tried Kaxinda 25mm f/0.95 ? the reviews for normal use is good, and it’s quite cheap – 175$ brand new. So i wonder how is it for hotspots

On a Canon 40D with 590nM conversion, I can confirm the Sigma 10-20mm f/4-5.6 EX HSM DC* hotspots that start to appear at f/13 and is visible at f/22. I’d say it’s mild from examples I’ve seen posted by others from other lenses.

Hello all, Just a note to all of you about lenses. Lens manufacturers attempt to make the same designated lens consistent over time, with the transmission of visible light. The lens manufacturers have to buy glass, grind the glass and in most cases coat the glass with various coatings. Glass produced by different glass companies can vary in composition, current production and over time. The lens makers work with various coating materials that can change over time. Then the lens makers tweak lens elements, such as using optical plastics in newer versions of any designated lens. On top of all that change, manufacturing tools, jigs, and testing equipment wears in use. A lens made and tested on new equipment can be slightly different to the lens made on the older equipment. What that means is each of the lenses will be within designed tolerances, but different nevertheless. Cheaper lenses can be as sharp and as good a performers as expensive professional lenses. But they also wear out faster. The various gears, cams, aperture controls, etc.,in any lens wears over time. These components can be metal in an older lens, and plastic or engineered polymers in newer lenses.Plastic doesn’t necessarily equate to bad. And then then we have the greases used in the lenses. Grease thickens or hardens over time. For instance Nikon greases stand up over time and Leica grease has to be dug out and replaced every 20 years or so. There are optical companies that make lenses for a large number of different camera makers and lens re-sellers. So the same lens can be sold under different brand names. On top of all that, the lens makers are trying to eliminate the transmission of UV and IR light and improving the transmission of visible light. So you are trying to make a lens do something that it is designed to NOT do. Taking into account all the variables involved, of course some lenses show “inconsistent” results in IR and UV testing. What that all means is that any copy of any lens can vary in almost any test or application.

I definitely need to contribute too 😉 Here are the lenses I have tested: – Nikon 85mm f/1.4G (model 2195) – Nikon AF Micro-NIKKOR 200mm f/4D IF-ED (model 1989) – Nikon AF-S NIKKOR 300mm f/4E PF ED VR (model 2223) – Rokinon 20mm f/1.8 ED AS (model RK20MAF-N) – Samyang 24mm f/3.5 ED AS UMC Tilt-Shift (model SYTS24-N) – Sigma 50mm f/1.4 DG HSM Art (model 311306) – Sigma 135mm f/1.8 DG HSM (model 240955) – Tamron 17-35mm f/2.8-4 DI OSD (model A037N) – Tamron SP 35mm f/1.4 Di USD (model F045N) – Tamron 35-150mm f/2.8-4 Di VC OSD (model A043N) – Tamron SP 70-200 f2.8 Di VC USD G2 (model A025N) – Tamron 90mm f/2.8 Di VC USD Macro (model F017N) Each one combined with these IR filters: – 830nm (Deep B&W IR) – 720nm (Standard IR – Hoya R72) – 590nm (Super Color IR)

I test by using a tree in my alley and centering the lens int he open sky just above the bright trees. My camera is 720nm A7II. No AR coating.

Edmund Optics offers a wide range of industrial and pointing lasers with different colors (red, green, violet, infrared). Some are handheld devices, while others come with cylindrical houses for easy integration.

i bought the new Olympus 8-25 f/4 Pro for my color camera but tested it on my full spectrum w/720nm IR filter. it has hot spots, very large, even, warm, all apertures , real bad over f/7.1, mostly correctable post processing.

I’ve successfully tested a Zeiss 50mm Planar T* F1.7 (Contax) at all apertures with no hotspots on a Canon 60D Full Spectrum at 720nm (Same test shows significant hotspots on Canon EF 50mm F1.4 which is already in Database)

Hey. By the way – add to my regret – the bad lenses Canon Otus 28 / 1.4. Hot spot at 720 and 850 nm. For IRCrome it will do, especially if you shoot in RAW.

Tried it at f8, it’s I think the worst hotspot I’ve ever seen on any lens at that aperture. This is on an APS-C A5100. Shots do seem usable in black and white, but in color it’s absolutely atrocious. After RGB-BGR channel flip there’s a massive yellow stain in the middle.

Laser power and energy meters are available from Edmund Optics in a wide selection of wavelength ranges for customization over a large number of laser measurement needs.

Edmund Optics’ optical windows are offered in a variety of substrates, such as germanium (Ge), silicon (Si), N-BK7, UV fused silica, zinc selenide (ZnSe), and potassium bromide (KBr). Multiple anti-reflection coating options are available for the ultraviolet (UV), visible, or Infrared (IR).

Any word on newer wide angle Canon RF options? (Especially interested in the RF 16mm f/2.8 STM, RF 14-35mm f/4 L IS USM, Laowa 14mm f/4 FF RL)

Edmund Optics is a leading global provider of optical technology solutions that has been serving a variety of markets since 1942. The company employs more than 1,250 people across eighteen global locations and continues to expand. Edmund Optics services its customers through two distinct offerings: MARKETPLACE and OPTICAL MANUFACTURING!

Edmund Optics offers various kinds of off-axis parabolic mirrors, where the mirror coatings can be made of aluminum, silver or gold. Mirrors with alignment holes are also available.

Then, you have a triple listing of the 85mm PC Micro Nikon 85mm f/2.8 PC Micro Nikon 85mm f/2.8 PC-E Micro Nikon 85mm f/2.8 D PC-E Micro

Our laser alignment phosphor products offer greater performance and safety to users of UV, visible, and IR lasers. They reduce problems associated with beam visualization, profiling and alignment in many applications. All ranges available in three formats. The laminated credit card-style is for low power sources and reflective viewing only. The 25-mm disk and clip-on wand style is used when frequent component positioning is required. The removable disk is positionable at an optics location to enable precise alignment, while wand format permits handling into beam path. Optical bench-mountable head format has large active area and ¼-20 threaded mounting for standard imperial post/post holder integration.

Do the hotspot happen only when doing IR? I have a full spectrum and I am planning on getting a hot mirror filter, but wanted to know if I would experience the hotspots when doing Visible Spectrum photography?

Edmund Optics offers laser beam shaping solutions to collimate laser beams, transform beam profiles, convert beam shapes, and much more. Flat top beam shapers, used to convert Gaussian beams into flat top beams with a uniform intensity distribution, are available optimized for laser wavelengths associated with Nd:YAG, fiber, and CO2 lasers. Cylinder Lenses, offered in broadband and laser line versions, are ideal for laser machining or medical applications, which require laser light shaping in only one axis. Slow axis collimators and fast axis collimators are also available, which are ideal for collimated laser bars and laser diodes, respectively.

I’ve tried a few others as well, but 90% of the time I’ve got the Panasonic 25mm 1.7 on my converted em1.ii. It’s tiny and sharp and cost less than the filter attached to it. The hot spot above 5.6 doesn’t bother me because I pretty much never need smaller. People use tiny apertures too much as it is, and in infrared there are even more reasons not to.

2. The color and bokeh of the ƒ1.4 lenses all made me happy with the exception of the Ninja Star issue on the Oly. If I was not shooting IR there is not a loser among the rest.

Could you recommend IR suitable lens from m42 mount? I love my Helios 44-2 58/2 but wasn’t able to find reliable feedback how this lens works with IR filer. But I’m happy to try other m42 lenses if you recommend some 🙂 .

Edmund

Tamron 28-200 with 590nm on Sony a7 RIII excellent Lense – excelense. No Hotspots no Color Spots. Tried f4 and f5.6 – will test f8 and f11 soon.

So I have gone crazy with testing Standard/Normal old glass over the past three months. I shoot a pair of oak trees in front of my apartment building late in the afternoon. Testing season will be done soon 🙁

No Hotspots or Color Spots when the Sun is behind me. 28-75mm wins on 760nm at 28mm, and on 590nm the 17-28 wins at sharpness using F8 and F11.

Sigma 10-20mm f / 3.5 EX DC HSM ELD SLD (flares, but ok with hotspots) to is the IR range? What it is? Does the lens work or not?