Microscopes | Physics - where is the objective lens on a microscope

 2024-10-14 13:17:54

They are designed to have a distance of 0.69 inches (17.5mm) between the mounting flange and the film/sensor surface. There also is an issue with the "near ...

I had such an amazing birthday yesterday and took SEVERAL reflecting/mirror selfies so I thought I'd post a few more to round out the "birthday weekend" 365 shots.

Olympus Infinity S point and shoot slide positive film #35mm #35mmfilm #film #filmisnotdead #analog #filmisalive #greece #greek #hellas #olympus #art #arts #sea #aegean #marathon #retrochrome #positivefilm #slidefilm

The lens configuration is said to be Ernostar type (yes, they say everything and its opposite… but, hei… Ernostar was the fastest lens in the world at the time, back in 1929; the final f1.8 version gave the model for the Bertele's Sonnar, which he developed in 1931 for Zeiss, the origin of a cascade of designs of lenses packed in three groups… which eventually grew more numerous again later.. but there you can trace the origin of the smooth background blur of these tools).

There was a slight haze, but the moon came out pretty well --almost a full moon. Used the vintage Nikon 300/4.5 AI-S mounted on Olympus e-m5 mkiii -- not an easy task because when adapted, the lens goes way past infinity. I always have to take multiple shots with slightly different focuses, then delete the bad ones when I get to the computer. This was the best of the lot. Of course this is heavily cropped. Maybe I'll get a Nikon 2x TC to see if I can get a better image with it.

The Optelec PowerMag+ Pocket Magnifier is fitted with a bright white LED, providing consistent high-contrast lighting and a wide field of view. Made with high- ...

320:365 I had such an amazing birthday yesterday and took SEVERAL reflecting/mirror selfies so I thought I'd post a few more to round out the "birthday weekend" 365 shots. Shot No. 1 was yesterday's Infinity Mirrors Room. This is installment No. 2 =]

Olympus Infinity Twin/AF-1 Twin at the long 70mm end. Scanned with Primefilm 3650u. Definitely softer than the 35mm lens, but darn if this isn't pretty great for molded plastic lenses on a late 80's point-and-shoot.

Fotospaziergang mit Sabine.R. Der Weihnachtsmarkt am Alex war unsere Ausweich-Location für die Aussichtsterrasse des Park Inns, von der wir ja zuvor fast weggeweht worden waren.

In experimenting with the macro lens I found that focusing at 1:1 "eats" light, something I hate to put up with. By focusing at infinity and getting to 1:1 using a supplemental lens, there's no loss of light. Using a variety of different supplemental lenses I can boost the magnification to about 5:1. It's a very good thing that the camera has image stabilization.

Riesenrad auf dem Weihnachtsmarkt am Neptunbrunnen / Alexanderplatz in Berlin-Mitte. Von hinten (außerhalb des Marktgeländes) aufgenommen, weil wir nur von dort genügend Abstand zum Riesenrad hatten. Von vorn mussten wir uns praktisch direkt davorstellen, um nicht störende Buden, Aufbauten etc. im Bild zu haben, das ging aber doch sehr zulasten eines "normalen" Blickwinkels. Eingerahmt vom Riesenrad seht Ihr die Marienkirche und den Fernsehturm.

Houston, Texas -- 1992--Houston Astros baseball game. Kodak ASA 200 Color Negative film, Olympus Stylus Infinity 35 mm compact camera. The large white indoor robot dirigible carried advertisements on the sides. The Houston Astrodome was the world's first covered air conditioned sports stadium. It was nicknamed " Eighth Wonder of the World." It opened in 1965 and held it's last event in 2003. Today, 2011, it remains awaiting a new use.

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I recently acquired another Olympus Trip 35, sith a stuck aperture, but for five bucks it would have been stupid not to give it a shot. I did get the aperture cleaned up and working all right (I had read people raving about the cleanness of designs made under Maitani's direction... well, that les assembly sure is clean and effective) and when time came to set focus, it dawned on me that the Trip 35 doesn't have a B time. Oh fuck! I hoped that screwing the front element all the way would do the trick. No such luck, as it turned out, looking at the whole roll I'm pretty sure I set the infinite marking past infinity. There seems to be a trick to block a gear and thus keep the shutter open, but I'd rather not do that. Instead, I plan take a set of pictures at different marked positions and use these as reference to set infinity. We'll see. Anyways, I'm of generally optimistic nature, so I took that Trip 35 to the Dippemess and pretty much wasted a perfectly good roll of APX 100.

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I also took a capture with the m.zuiko 25mm F1.8 from this position which looks more abstract because I got considerably closer to the subject. That capture also looks less Christmassy (not at all, actually), because it shows just the Ferris wheel and the TV Tower; I will keep that for January ;-)

Some photos I took at Downtown Summerlin in Las Vegas. I used an Olympus 35RC rangefinder and the film used was Arista EDU 200 developed in Rodinal 1:50 for 10 minutes at 20 degrees C. Prior to shooting these I reset the viewfinder image. I was having an issue with the image lining up at the infinity setting so I removed the brass plug located above the shutter with a very small flathead screwdriver and then used the screwdriver to reset the adjustment screw so that the images in the viewfinder aligned. Seems to be ok, now. I really like this little camera because it's so easy to load and use and it fits in my pants pocket, and it's built like a small tank. My meter doesn't work so I use sunny 16 or a light meter app and this seems to work fine.

Finally, my camera is back from servicing. Hence using it on this amazing location to test that it's fully recovered and ready for action.

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Here's a frog taken with the front lens group (objective) from an Olympus 35-180mm lens removed from an Olympus IS-3 DLX film camera, reverse mounted onto the front of a Nikon 105mm f/2.5 AI-S lens. A bit distracting are the reflections of the foil covered reflector cards on my home-made pop-up flash macro bracket. After one pop of the flash the frog was gone. Focusing when using these close-up add-ons is done manually by moving the camera forward and backward until the image is sharpest. The primary lens is almost always set at infinity. Not all "kludged" add-on lenses are perfect for use on every lens. Some just aren't good optical "matches". Often there's a bit of testing involved in getting a lens plus add-on combination that's worth using. Despite using an aperture of f:22, depth of field is very thin. 20110814-MA-058

As promised, here's a half-arsed review of a lens I picked up not long ago: the Wesley 24mm f/1.4. It's cheap - about $42 on ebay. It's a CCTV lens, and interesting because it covers a 1" image circle, rather than the more common 2/3" or much more common 1/2" that you usually see in CCTV lenses. This means it doesn't vignette a lot on a micro 4/3 sensor. If you're not one of those wankers who shoots walls and test charts, for practical purposes it doesn't vignette at all. It's reasonably sharp. Not super-sharp, but sharp enough for everything a normal person would ever need. It won't be any use to you if you like starting fights on dpreview, but hey, I did specify normal people. The bokker is OK. Not great. A bit lemony. A bit swirly, but nowhere near as swirly as some of the other similar CCTV lenses. Not perfectly creamy, but not seriously harsh either. The body is quite solid. It's roughly the length of an Olympus 14-42 kit lens, but thinner and heavier. Aperture and focus rings are reasonably smooth. The one I got came with a crappy rubber hood, three macro extender rings, a front cap and two rear caps - one for the C-mount, and another that fits my M/43 lenses. And there's an awesome sticker on the box that says "C-Mouts". If you're interested in DoF differences between M4/3 sensors and 35mm film (or "full frame" DLSR), here's a roughly equivalent shot from a few years back. Equivalent focal length, but half a stop faster on the old shot. There's clearly way more than half a stop of difference in DoF between the two. Still, it was shallow enough here that I had to fiddle around to get a decent focus. Which reminds me - on the adapter I'm using, it focuses past infinity. So yeah. 42 bucks for a brand new fast fiddy equivalent. Can't go wrong really.

I've never been one of those "busy people" but holy crap, I've barely even had time to edit photos this week. Here's one from my $1 film camera. Taken on Kodak something or other. Bloomington, IN

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Using a small piece of blue tack I submerged the seed head on a plate filled with milky water to create an infinity pool. I also used a flash and bounced the light onto the surface using coloured cards, yes I did lots of different coloured versions but this was my favourite!

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It's the SpaceShutter - 'TurTurJu', completed during the Year 2080. My love ones and I have bought the tickets in the year 2010. As population kept multiplying on Mother Earth, my love ones have the privilege to fly to the Moon and stay.

Abstract of Epcot's Mission Space attraction in Future World. Since we'll be bombing the Moon today, this just seemed appropriate somehow.

The Sands Skypark sitting 200 metres high on top of this 3 tower 55 storey hotel is a modern engineering marvel. At 38m wide and 340 m long, equivalent to the length of four and a half Airbus 380s, it is the world's longest public cantilever constructed from a pair of tapering post-tensioned steel box girders up to 10m deep, supporting the concrete deck. The Sands Skypark can accommodate up to 3,900 people and has a 150 metre infinity pool overlooking the city, restaurants and bars and an observation deck which you can access for $23 if you are not a guest. Do not however try to get in for free as some backpackers do. It is considered trespassing and if caught by security staff, your stay in Singapore could well be extended, but you won't be staying at the Marina Bay Sands Hotel!

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Lately I've been "woodshedding"—trying to push out of my comfort-zone shooting habits. So for this one, I broke these personal "rules":

It's cheap - about $42 on ebay. It's a CCTV lens, and interesting because it covers a 1" image circle, rather than the more common 2/3" or much more common 1/2" that you usually see in CCTV lenses. This means it doesn't vignette a lot on a micro 4/3 sensor. If you're not one of those wankers who shoots walls and test charts, for practical purposes it doesn't vignette at all.

Taron Chic 1961Half-Frame 30mm Taronar lens, f2.8 - f22 Zonal focusing lens from 2ft to infinity. Distance scale markings for (S) scenic, (G) groups, and (P) person. Shutter speed B, 1/30 to 1/250. Selenium light meter with colors rather than shutter speeds. Vertical frame (this set it apart from other half-frames like the Olympus Pen which used the horizontal frame.)

by S Gao · 2018 · Cited by 10 — Routine quality assurance for linear accelerators (linacs) usually involves verification of beam steering with a water scanning system.

If you're interested in DoF differences between M4/3 sensors and 35mm film (or "full frame" DLSR), here's a roughly equivalent shot from a few years back. Equivalent focal length, but half a stop faster on the old shot. There's clearly way more than half a stop of difference in DoF between the two. Still, it was shallow enough here that I had to fiddle around to get a decent focus. Which reminds me - on the adapter I'm using, it focuses past infinity.

An American science fiction horror anthology television series created and presented by Rod Serling, which ran for five seasons on CBS from 1959 to 1964.

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This shot was inspired by a shot [http://www.flickr.com/photos/marlton-mom] did on the Astro Orbitor. I have to say it's a little un-nerving to sit in the little rocket with a tripod between your legs trying to keep your spaceship level with the one in front of you while you pop pictures off twirling around about what feels like a hundred feet in the air at night.

At this time of the year dandelions are growing at a lightning pace, their abundance making them ideal and popular subjects for macro photography!Using a small piece of blue tack I submerged the seed head on a plate filled with milky water to create an infinity pool. I also used a flash and bounced the light onto the surface using coloured cards, yes I did lots of different coloured versions but this was my favourite!

Olympus 35RC 42mm f2.8 Lens / Olympus AFL-S 38mm f2.8 Lens / Olympus Quick Flash AFL 38mm f2.8 Lens / Olympus Infinity AF 35mm f2.8 Lens

Ferris wheel at the Christmas market at the Neptunbrunnen (Neptune Fountain) on Alexanderplatz in Berlin-Mitte. Photographed from the back (outside the market area; at the market itself we had to get so close to the Ferris wheel, actually we had to stand right in front of it, that it was impossible to photograph it at a "normal" angle of view). Framed by the Ferris wheel are the Marienkirche (St. Mary's Church) and the Fernsehturm (TV Tower). First attempts with the teeny tiny Laowa C-Dreamer 7.5mm F/2 ultra wide-angle prime lens. Most of the time I completey forgot that the lens is all manual, so I was happy to discover later at home that the rather accidental focus setting to "almost infinity" yielded sharp results. The Laowa obviously creates nice starburst effects, but is also very prone to the wildest flares (which you can see here on the left inside of the wheel), so it will be inevitable to remove the most irritating ones in Photoshop later as it's nearly impossible to avoid those flares in certain light situations. I also took a capture with the m.zuiko 25mm F1.8 from this position which looks more abstract because I got considerably closer to the subject. That capture also looks less Christmassy (not at all, actually), because it shows just the Ferris wheel and the TV Tower; I will keep that for January ;-) Photowalk with Sabine.R Weihnachtszentrifuge Riesenrad auf dem Weihnachtsmarkt am Neptunbrunnen / Alexanderplatz in Berlin-Mitte. Von hinten (außerhalb des Marktgeländes) aufgenommen, weil wir nur von dort genügend Abstand zum Riesenrad hatten. Von vorn mussten wir uns praktisch direkt davorstellen, um nicht störende Buden, Aufbauten etc. im Bild zu haben, das ging aber doch sehr zulasten eines "normalen" Blickwinkels. Eingerahmt vom Riesenrad seht Ihr die Marienkirche und den Fernsehturm. Erste Gehversuche mit dem winzig kleinen Laowa C-Dreamer 7.5mm F/2 Ultraweitwinkel (von Sabine.R anerkennend - und natürlich mit Augenzwinkern - "Nuckelobjektiv" getauft). Die meiste Zeit hatte ich überhaupt nicht daran gedacht, dass das Objektiv komplett manuell ist und war zuhause dann überaus angenehm überrascht, dass die auch mehr zufällige Fokusstellung auf "fast unendlich" doch scharfe Resultate erzielt hatte. Offensichtlich zaubert das Laowa schöne Blendensterne, ist aber leider auch extrem anfällig für die wildesten Flares, hier zu sehen im linken Bereich innerhalb des Riesenrads. Da bleibt nur, das, was absolut stört, bei der Bearbeitung zu entfernen, da man die Flares in bestimmten Lichtsituationen schlicht nicht vermeiden kann. Ich habe hier auch noch ein Foto mit dem m.zuiko 25mm F/1.8 gemacht, das aber abstrakter wirkt, weil ich mit der Normalbrennweite natürlich das Motiv viel näher ranbekommen habe. Da jenes Foto auch völlig "unweihnachtlich" ist, weil man nur einen Teil des Rades und den Fernsehturm sieht, hebe ich es mir für den Januar auf ;-) Fotospaziergang mit Sabine.R. Der Weihnachtsmarkt am Alex war unsere Ausweich-Location für die Aussichtsterrasse des Park Inns, von der wir ja zuvor fast weggeweht worden waren.

The Sands Skypark can accommodate up to 3,900 people and has a 150 metre infinity pool overlooking the city, restaurants and bars and an observation deck which you can access for $23 if you are not a guest. Do not however try to get in for free as some backpackers do. It is considered trespassing and if caught by security staff, your stay in Singapore could well be extended, but you won't be staying at the Marina Bay Sands Hotel!

A few people have asked about processing, so I thought I'd add that processing was minimal---just the stuff I normally do. A little levels, a little hue/saturation, a little sharpening. The color of the sky is natural, the moon and geese are too. The geese look the way they do because my shutter speed was slow--producing a motion blur effect, AND because I was focused on infinity.

Olympus Stylus Infinity/MJU IPC 400 (President's Choice/Fujicolor Superia X-Tra 400), expired 2005, shot @ ASA/ISO 200Developed in Unicolor for 4:30 minutesPakon F135

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I find this image to be somehow distressing...Olympus Infinity S, Fujicolor C200 in Rollei C-41 chemicals. Taken in Baveno (VB) . Italy

Geese flew through my moon shot. At the time I thought they were sandhill cranes but on viewing in the computer I think they're geese. Feel free to weigh in. ;-) There's swans in the neighborhood too, but these still look like geese to me. I love the way the slow exposure translated to a ghostly movement with these winged critters. A few people have asked about processing, so I thought I'd add that processing was minimal---just the stuff I normally do. A little levels, a little hue/saturation, a little sharpening. The color of the sky is natural, the moon and geese are too. The geese look the way they do because my shutter speed was slow--producing a motion blur effect, AND because I was focused on infinity.

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Spherical aberration describes how a wavefront deviates from the ideal after passing through a refracting surface. In actuality, it is a measure of the effect a ...

Infinity 8 [IMO 8681393 /MMSI 503644000] having left its mooring in Rous Head Harbour to head up the Swan River to I assume the Crown Casino as the Infinity 8 is the Crown Casino's Super Yacht.

Pretty much a total fail for the lunar redscale. 😞 Need faster film and a much heavier tripod at the very least. The slow (f/8) lens meant my shutter speeds were way too low (1/125) for a 500mm lens, and my little tripod is not sturdy enough to damp camera shake. It also meant focusing was very difficult, as this lens has no hard infinity stop. Maybe I'll try again if I can get some Natura 1600 or something. This one's the least horrible from the roll. Olympus OM-2n, Tamron 500mm mirror lens, Agfa Vista 200.

Regrettably the unexpected happened: it not only cleaned up effortlessly in no time, but as soon as I mounted it and tested it, I was blown away. As I would read in a review shortly after, I couldn't agree more: «with the exception of the ridiculously rare and prohibitively priced Pentax-A 135 f1.8, this is as good as it gets for 135mm in the vintage Pentax world». The similitudes of the depiction with H.I.M. 135/1.8 are striking.

From a glass of foaming amberher lips formed liquid wordsthat soothed the senses like a velvety caressin soft infinity This is my entry into the MACRO MONDAYS competition theme "Glass" for the week beginning 24 August 2020. It's my very first entry into any Flickr competition, so I hope I've got it right. What a great fun thing to do. I took this photo using a pink wine glass, soap bubbles from the top of our dishes water and a strong LED light. I thoroughly enjoyed making the picture. Question: What does HMM mean that people are putting in their comments here?

Here's a small bee I found in my back yard. I was searching for ballooning spiderlings that sometimes land on small pine trees and saw several small brown "things" stuck on the end of needles of several trees. Looking closely, they appeared to be small dead bees, similar to what's left after a jumping spider dines on one. They had the "dead bug" look... legs folded up underneath. I gently poked one and was surprised when it suddenly flew away. Viewing another through the viewfinder I could see that it was grasping the needle with its mandibles and just hanging off the end with its legs folded up. Checking a half dozen others scattered around my yard I noticed that all had hold of the needles near the end and their body unsupported. Taken with an Olympus OM-D E-M1 mark II, 60mm f/2.8 macro lens, focused at infinity, with the objective from a Soligor 90-230mm zoom lens reverse mounted on the 60mm, lighting provided by a small external flash shot through a lens-mounted diffuser made from the plastic bowl that comes in a frozen dinner. In experimenting with the macro lens I found that focusing at 1:1 "eats" light, something I hate to put up with. By focusing at infinity and getting to 1:1 using a supplemental lens, there's no loss of light. Using a variety of different supplemental lenses I can boost the magnification to about 5:1. It's a very good thing that the camera has image stabilization. AC-27669

Infinity 8 [IMO 8681393 /MMSI 503644000] having left its mooring in Rous Head Harbour to head up the Swan River to I assume the Crown Casino as the Infinity 8 is the Crown Casino's Super Yacht.

I hate jogging in the dark and in the snow. But I love this little weatherproof film camera. Lately I've been "woodshedding"—trying to push out of my comfort-zone shooting habits. So for this one, I broke these personal "rules": 1. Never frame the subject in the center.2. Never use flash if there's enough available light.3. Use shallow DoF when possible.4. Get close to the subject. I'm finding it surprisingly hard to change these unconscious reflexes!

I find this image to be somehow distressing...Olympus Infinity S, Fujicolor C200 in Rollei C-41 chemicals. Taken in Baveno (VB) . Italy

For personal disaffection, I long avoided 135mm focal lengths, with the only exception of H.I.M. smc Pentax 135mm f1.8 - for obvious reasons. However, last week, out of a bargain I got my hands on an apparently crippled copy of this lens on auction (not really for peanuts this time) with the idea of restoring it and - if possible - selling it immediately after.

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Used an Olympus Infinity Jr. 35mm point & shoot camera. I've had this camera since1985, it's been all over the Mediterranean on deployments while I was in the Navy. It still works like it did when I bought it at the Navy Exchange for what I think at the time was $185. The only problem is that is that it's really easy to get your finger in the photo, I have several that I have to crop and otherwise edit to try and fix :>}

The seven demonstrations are Spectrum of Light, The Polarization of Light, Optical. Filters, Prisms and Lenses, Interference and Diffraction with a Single Slit, ...

At this time of the year dandelions are growing at a lightning pace, their abundance making them ideal and popular subjects for macro photography!

The bokker is OK. Not great. A bit lemony. A bit swirly, but nowhere near as swirly as some of the other similar CCTV lenses. Not perfectly creamy, but not seriously harsh either.

Anyway, the build quality (all metal) and mechanical operation are excellent: the focus ring travels smooth from the min. focus of about 1.5m and infinity in about 210°, while a clicking aperture goes from F 2.5 to 22. The sharpness is remarkable for the age; good natural color canvas with a slight suppression of yellows and orange tones, giving you a gray-bluish cast. You certainly have some CA and vignette, when used wide open (but that is a no brainer, since otherwise you would not be interested in legacy lenses) and the foreground and background bokes are fantastic. Just like a plasma gun: it melts everything!

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Taken with an Olympus OM-D E-M1 mark II, 60mm f/2.8 macro lens, focused at infinity, with the objective from a Soligor 90-230mm zoom lens reverse mounted on the 60mm, lighting provided by a small external flash shot through a lens-mounted diffuser made from the plastic bowl that comes in a frozen dinner.

First attempts with the teeny tiny Laowa C-Dreamer 7.5mm F/2 ultra wide-angle prime lens. Most of the time I completey forgot that the lens is all manual, so I was happy to discover later at home that the rather accidental focus setting to "almost infinity" yielded sharp results. The Laowa obviously creates nice starburst effects, but is also very prone to the wildest flares (which you can see here on the left inside of the wheel), so it will be inevitable to remove the most irritating ones in Photoshop later as it's nearly impossible to avoid those flares in certain light situations.

It's called Tulips by Jeff Koons. Mirror-polished stainless steel with transparent color coating. I thought it was perfect for me as I like flowers =]

This is my entry into the MACRO MONDAYS competition theme "Glass" for the week beginning 24 August 2020. It's my very first entry into any Flickr competition, so I hope I've got it right. What a great fun thing to do.

Smile on Saturday theme: Infinity symbol 😄 Thanks to everyone who took the time to view, comment, and fave my photo. It’s really appreciated. 😊

©Jeremy Photography 2018 "ANNOUNCMENT! ANNOUNCEMENT!" "The SpaceShutter from Earth to Moon to Mars is taking off in ET 5-minutes!" "All onboard now!" It's the SpaceShutter - 'TurTurJu', completed during the Year 2080. My love ones and I have bought the tickets in the year 2010. As population kept multiplying on Mother Earth, my love ones have the privilege to fly to the Moon and stay. What a dream come true... Anyway, back to reality. *Face Smack* Here I present my first photo in the brand new year - 2018. Finally, my camera is back from servicing. Hence using it on this amazing location to test that it's fully recovered and ready for action. Happy New Year to All of You!Have a Blissful and Wonder 2018!Keep Shooting All of You!Cheers Jeremy Hui Photography | Getty Collection | Shutterstock | Room the Agency | Facebook Page

Designed to measure the output from the end of an optical fiber, the extinction ratio meter provides a measurement range of 0 to 30 dB.

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There is a fifth dimension, beyond that which is known to man. It is a dimension as vast as space and as timeless as infinity. It is the middle ground between light and shadow, between science and superstition, and it lies between the pit of man's fears and the summit of his knowledge. This is the dimension of imagination. It is an area which we call The Twilight Zone. An American science fiction horror anthology television series created and presented by Rod Serling, which ran for five seasons on CBS from 1959 to 1964. Today's self portrait.

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Erste Gehversuche mit dem winzig kleinen Laowa C-Dreamer 7.5mm F/2 Ultraweitwinkel (von Sabine.R anerkennend - und natürlich mit Augenzwinkern - "Nuckelobjektiv" getauft). Die meiste Zeit hatte ich überhaupt nicht daran gedacht, dass das Objektiv komplett manuell ist und war zuhause dann überaus angenehm überrascht, dass die auch mehr zufällige Fokusstellung auf "fast unendlich" doch scharfe Resultate erzielt hatte. Offensichtlich zaubert das Laowa schöne Blendensterne, ist aber leider auch extrem anfällig für die wildesten Flares, hier zu sehen im linken Bereich innerhalb des Riesenrads. Da bleibt nur, das, was absolut stört, bei der Bearbeitung zu entfernen, da man die Flares in bestimmten Lichtsituationen schlicht nicht vermeiden kann.

I've never been one of those "busy people" but holy crap, I've barely even had time to edit photos this week. Here's one from my $1 film camera. Taken on Kodak something or other.

Olympus E--M1MarkII, 60mm f/2.8 macro lens focused at infinity, with a "mystery" lens of unknown focal lens mounted on the 60mm. The Mystery Lens is a three element internal optic removed from a badly damaged zoom lens (can't remember which one). I had originally trashed it because I was only interested in recovering the zoom lens' objective. Later, while bagging the trash for rubbish day pickup, I realized that I had failed to to a quick check to see how many elements it had. I retrieved it, and did a quick "flashlight" test to determine how many reflections I found. Each separate lens element produces two reflections... one from the front surface and another from the back. With this lens I counted six reflections... a three element design crammed into a lens only 3/8 inches thick with a clear diameter of 1.5 inches... a VERY compact and lightweight item. Tests revealed this thing to be an outstanding supplemental lens when mounted with the convex lens surface toward the camera, the concave toward the subject.

LENS MANIA: ASAHI OPT. CO. Super-Multi-Coated Takumar 135mm f2.5 (Model 1 bis) My new showstopper!This lens really made my past week... and many more to come! For personal disaffection, I long avoided 135mm focal lengths, with the only exception of H.I.M. smc Pentax 135mm f1.8 - for obvious reasons. However, last week, out of a bargain I got my hands on an apparently crippled copy of this lens on auction (not really for peanuts this time) with the idea of restoring it and - if possible - selling it immediately after. Regrettably the unexpected happened: it not only cleaned up effortlessly in no time, but as soon as I mounted it and tested it, I was blown away. As I would read in a review shortly after, I couldn't agree more: «with the exception of the ridiculously rare and prohibitively priced Pentax-A 135 f1.8, this is as good as it gets for 135mm in the vintage Pentax world». The similitudes of the depiction with H.I.M. 135/1.8 are striking. The lens was produced in two version between 1965 and 1975. The first one had two variants: an original ‘Super-Takumar’ with 5 lenses in 4 groups, and a second variant, which was named ’Super-Multi-Coated Takumar’, with the first SMC coating. A second model appeared later, in 1972, more sought after because reportedly sharper and more corrected, with the 6 elements in 6 groups - which will pass ‘as such’ into the following smc Pentax 135/2.5 tube; a lens deceivingly named again ‘Super-Multi-Coated Takumar’! Well, the lens I stumbled upon, falls right in the middle of them: model 1 bis, i.e. 5/4 lenses and coating. How to distinguish ‘model 1 bis’ from ‘model 2’? Just check the numbers on the focus scale before infinity: model 1 displays 30, while model 2 has 35. As simple as that. If you want to be sure, then, you can check the the following: - serials under the A/M Switch: 43802 vs. 43812- on DOF scale: ‘diamond’ vs. ‘4’- 6 blades vs. 8 blades- weight: 444g vs. 470g- serial range: 4723512 - 5848208 vs. 6138465 - 8203248 The lens configuration is said to be Ernostar type (yes, they say everything and its opposite… but, hei… Ernostar was the fastest lens in the world at the time, back in 1929; the final f1.8 version gave the model for the Bertele's Sonnar, which he developed in 1931 for Zeiss, the origin of a cascade of designs of lenses packed in three groups… which eventually grew more numerous again later.. but there you can trace the origin of the smooth background blur of these tools). Anyway, the build quality (all metal) and mechanical operation are excellent: the focus ring travels smooth from the min. focus of about 1.5m and infinity in about 210°, while a clicking aperture goes from F 2.5 to 22. The sharpness is remarkable for the age; good natural color canvas with a slight suppression of yellows and orange tones, giving you a gray-bluish cast. You certainly have some CA and vignette, when used wide open (but that is a no brainer, since otherwise you would not be interested in legacy lenses) and the foreground and background bokes are fantastic. Just like a plasma gun: it melts everything! It came in mint condition with caps, hood and box! At home, Tokyo, Japan. © Michele Marcolin, 2023. GR3, Em1+12-40/2.8

by G Hass · 1956 · Cited by 98 — By changing the evaporation time required to produce an 800 A thick coating from 2 sec to 130 sec at a pressure of 1×10−5 mm Hg, the reflectance is reduced ...

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I just love this shot. So much going on. People looking all directions, pointing, shooting, talking, thinking.... and it's so bright and colorful!

The intensity of transmitted light becomes maximum when the inserted polaroid and analyser (the Polaroid which receives light that is transmitted by inserted ...

This is a tiny spider I encountered while bug hunting in a thicket of Multiflora Rose beside my garage. They bloom in late May and June, attracting a variety of very photogenic bees, beetles, spiders, and other bugs... all of which are fairly easy to photograph, providing I can steer clear of thorns. I was getting a few pics of a longhorn beetle, shooting a flash through a lens-mounted diffuser made from the plastic bowl that comes in a "Healthy Choice" frozen dinner. Wanting to get a bit more light with slightly more pronounced shadows, I removed the diffuser and was ready to shoot when I noticed the spider crawling along near the rim. Here it's inside the diffuser, on the side that faces the subject. Its size can be gauged by the fact that the bowl used for the diffuser is 7.5 inches in diameter. The portion used for its construction is about 1/3 of its circumference. To get this pic I dialed back the flash intensity, held the diffuser in front of the camera and popped off the shot. I went down to my computer room to arrange for getting a few more pics and by the time I got there the spider was beginning to construct a web, as if it was planning to take up residence on the diffuser. After getting a few more pics I released it in the rose bush, snapping a somewhat soft image as it was scooting away behind some buds. Olympus E--M1MarkII, 60mm f/2.8 macro lens focused at infinity, with a "mystery" lens of unknown focal lens mounted on the 60mm. The Mystery Lens is a three element internal optic removed from a badly damaged zoom lens (can't remember which one). I had originally trashed it because I was only interested in recovering the zoom lens' objective. Later, while bagging the trash for rubbish day pickup, I realized that I had failed to to a quick check to see how many elements it had. I retrieved it, and did a quick "flashlight" test to determine how many reflections I found. Each separate lens element produces two reflections... one from the front surface and another from the back. With this lens I counted six reflections... a three element design crammed into a lens only 3/8 inches thick with a clear diameter of 1.5 inches... a VERY compact and lightweight item. Tests revealed this thing to be an outstanding supplemental lens when mounted with the convex lens surface toward the camera, the concave toward the subject. AC27519

How to distinguish ‘model 1 bis’ from ‘model 2’? Just check the numbers on the focus scale before infinity: model 1 displays 30, while model 2 has 35. As simple as that. If you want to be sure, then, you can check the the following:

Olympus Trip 35 and its D. Zuiko 1:2.8 f=40mm, Agfa APX 100 in Fomadon 1+50 for 10 min @ 20°C, digitalized using kit zoom with macro rings.

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Ich habe hier auch noch ein Foto mit dem m.zuiko 25mm F/1.8 gemacht, das aber abstrakter wirkt, weil ich mit der Normalbrennweite natürlich das Motiv viel näher ranbekommen habe. Da jenes Foto auch völlig "unweihnachtlich" ist, weil man nur einen Teil des Rades und den Fernsehturm sieht, hebe ich es mir für den Januar auf ;-)

It's reasonably sharp. Not super-sharp, but sharp enough for everything a normal person would ever need. It won't be any use to you if you like starting fights on dpreview, but hey, I did specify normal people.

The body is quite solid. It's roughly the length of an Olympus 14-42 kit lens, but thinner and heavier. Aperture and focus rings are reasonably smooth. The one I got came with a crappy rubber hood, three macro extender rings, a front cap and two rear caps - one for the C-mount, and another that fits my M/43 lenses. And there's an awesome sticker on the box that says "C-Mouts".

Olympus 35RC 42mm f2.8 Lens / Olympus AFL-S 38mm f2.8 Lens / Olympus Quick Flash AFL 38mm f2.8 Lens / Olympus Infinity AF 35mm f2.8 Lens

The polarizing effect is particularly strong when sunlight is scattered through 90° (Fig. 14-13). On a clear day, when there is little water vapor or dust in ...

Walt Disney World, Epcot - 08/06/09Abstract of Epcot's Mission Space attraction in Future World. Since we'll be bombing the Moon today, this just seemed appropriate somehow.

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The lens was produced in two version between 1965 and 1975. The first one had two variants: an original ‘Super-Takumar’ with 5 lenses in 4 groups, and a second variant, which was named ’Super-Multi-Coated Takumar’, with the first SMC coating. A second model appeared later, in 1972, more sought after because reportedly sharper and more corrected, with the 6 elements in 6 groups - which will pass ‘as such’ into the following smc Pentax 135/2.5 tube; a lens deceivingly named again ‘Super-Multi-Coated Takumar’! Well, the lens I stumbled upon, falls right in the middle of them: model 1 bis, i.e. 5/4 lenses and coating.

321:365 Installment No. 3 of selfie shots from the epic, birthday day trip. This was taken in the Broad Museum while waiting for entry to the Infinity Mirrors Room. It's called Tulips by Jeff Koons. Mirror-polished stainless steel with transparent color coating. I thought it was perfect for me as I like flowers =] I just love this shot. So much going on. People looking all directions, pointing, shooting, talking, thinking.... and it's so bright and colorful!

I was standing in front of my house, looking down the street I live on, toward the heart of my little town on Christmas Eve. It certainly didn't look like Christmas with all the bright sun and clear weather. Taken with my hundred and third camera. Camera: Olympus Infinity MiniFilm: Kodak Gold 200 ASA 35mm color filmDate: December 24th, 2011, 11.22 a.m.Location: Norris City, Illinois, U.S.A. Olympus 25ff

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