Canon EF 50mm f/1.8 STM 50mm Lens featuring EF-Mount Lens/Full-Frame Format, Aperture Range: f/1.8 to f/22, 50mm Lens.

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I mean something like this: www.thingiverse.com/thing:297634 with Pen mount instead of Sony and the right length. 76 months ago (permalink)

View Port. Pinhole Eclipse Viewer. Page 1 of 2. Name. Date. Materials. ○ cardboard box (such as a cereal or shoe box). ○ scissors. ○ tape. ○ 3 x 3 inch ...

What Can You Interpret From A Retinal Photograph?   While up to 90% of all vision loss is preventable, many eye diseases and conditions have few or no early symptoms, meaning that many people don’t realise that anything is amiss until their eyesight starts to...

thanks! hmm but the picture isn't what they say it is... 77 months ago (permalink)

The level of detailed imaging that OCT scans provide allows your eye care professionals to assess important aspects of your eyes, including your vitreous humour (the jelly-like substance that fills your eyeball), your retina (the light-sensitive layer at the back of your eye), the macula (an area at the centre of your retina responsible for central vision) and the optic nerve (a nerve that sends signals from your eye to the brain to produce the images we see)

Jan 4, 2023 — The Eyepieces are the last part of the microscope through which the light rays from the light source pass. They participate in the final ...

Gauss' lens formula (1/(-a)+1/b=1/f) expresses the depth of field using the distance to a subject from the principal point. The subject distance used in Gauss' ...

An OCT is a way to look at the structures, tissues, and nerves function within the body in a completely non-invasive manner that is not possible with any other organ. In some cases, systemic conditions can be diagnosed early with this technique.

Outside of the field of optometry, these scans have also been shown to be a useful diagnostic tool in diagnosing early-stage skin cancers, among other conditions and areas of the body, including imaging the vessels of the heart, other skin conditions, dental tissues, the gastrointestinal tract, and the nerves when evaluating the central nervous system.

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Simply put, OCT is a type of specialised scan that assists optometrists in assessing the health of your eyes by allowing them to see the internal structures.

meganazulejo: yeah, i would send them a message to confirm. they sell a lot of adapters so they probably got the pic wrong. also i would offer $50. 85 is too much. Originally posted 77 months ago. (permalink) TimVo (a group admin) edited this topic 77 months ago.

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I am also interested in this adapter. Maybe we could try to 3D-print one. We need to find the bayonet models. The length of the adapter should be the difference between Flange Focal Distances in order to be able to focus infinity. FFD Pentax K = 45.46 mm FFD Olympus Pen F = 28.95 mm Length results 16.51 mm, which could give enough strength to the piece. 76 months ago (permalink)

not yet, but I emailed the seller Originally posted 77 months ago. (permalink) meganazulejo edited this topic 76 months ago.

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Airy definition: light and delicate. Check meanings, examples, usage tips, pronunciation, domains, related words.

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Imatest's software solutions and SFRplus test charts build upon the ISO standards so that our customers have the most capable image quality testing available.

3M™ Advanced Polarizing Film (APF) is a family of polymer-based multilayer optical films that can be laminated to the rear absorbing polarizer within the ...

Hello, I've been searching the nets for an adapter to use Pentax k lenses on my Olympus Pen FT. Does one exist? Take care, m 6:13PM, 24 July 2018 PST (permalink)

... Edmund Scientific's retail store was an emporium of educational toys and science kits to foster discovery and exploration. To view the full ...

• Diabetic retinopathy• Retinal detachment• Age-related macular degeneration• Macular holes• Glaucoma (up to four years earlier than traditional methods)• Macular swelling or creases/bulges (known as macular ‘pucker’)• Vitreous traction• Blood vessel abnormalities, including blockages• Changes to the optic nerve

OCT scans go one step further than standard 2D retinal photographs, using light waves to create intricately detailed, high-resolution 3D images of all layers and structures within your eye by taking cross-section pictures.

Optical coherencetomography

The OCT is a test that may incur an extra cost. At the time of having a full eye exam, the optometrist will discuss this. It is advisable to have this done, as it allows the complete and detailed record of the eye status saved for future comparison.

You can book your Optical Coherence Tomography scan as part of your regular eye test by contacting an Optical Co clinic near you.

These scans enable the optometrist to detect even subtle changes that can be indicative of early-stage diseases or other issues, potentially in a way that no other test can. Furthermore, it is a means of record keeping and comparison of data for future exams.

The OCT scan process is straightforward, being completely non-invasive and painless. The scanning technology uses low-power infrared laser light and will measure the light that reflects off your retina and optic nerve without radiation or X-rays. The process takes just minutes, with the results appearing instantly in digital format.

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thank you, TimVo. Strangely (or not), I have an adapter that allows me to use the Pen FT lenses on my digital Fujifilm X T-20. But that's all... Maybe I could double up with two adapters. For example, I see there is a Micro 4/3 one. Maybe: Pentax - Micro 4/3 to Micro 4/3 to Pen FT... Would the extra distance mess anything up? (I have a lot of Pentax K lenses, so I'd love to be able to use them on the Pen FT.) 77 months ago (permalink)

Optical coherencetomography OCT principle and technical realization

RP Optical Lab offer a variety of high performance Fix, discrete and continuous zoom thermal lenses covering the entire range of SWIR, MWIR, LWIR.

What Should I Expect During a Comprehensive Eye Exam?   Here at The Optical Co, we take extreme care and diligence with eye exams to ensure you get the best care and service, so that we can help identify any problems with your vision or eye health early so that...

This tiny laser power meter is less than ¾ thick, weighing less than 4 oz. (120 g). The controls, display and sensor are all neatly contained and protected ...

i found this info here: www.cameraquest.com/olypenf.htm The most important accessories were the lens adapters. The FT is thinner than any other 35 SLR. In theory, you can use any other maker's lenses if you have the adapter. Olympus made adapters for Nikon, Canon, Exakta, Pentax screw mount lenses. All of these could focus to infinity. It is very much worth noting that the Pen F/FT cameras with the Nikon adapter is just about the ONLY way to get a 1/500th flash sync with Nikon lenses. These adapters do not offer auto-diaphragm operation, you must do it manually. Olympus also made the very convenient OM to Pen F adapters, which allow the use of the OM's expansive and modern lens lineup. This adapter is particularly useful since OM lenses have a stop down depth of field button on the lens barrel. So, with OM lenses, it is very easy to focus white open, and then press the button to stop the lens down to shooting aperture. Lastly, also made was a Leica 39mm adapter, but this was good for close-ups only. 77 months ago (permalink)

meganazulejo: it probably doesn't exist because when the k-mount came (mid 70's) the pen f had already been discontinued at least 5 yrs earlier. i have a nikon adapter. not sure what other adapters were made but i bet the mount existed in the mid 60s. good luck hunting. 77 months ago (permalink)

Medicare Eye Test And Bulk Billing Explained   Up to 90% of all vision loss is preventable, so here at the Optical Co, we strongly believe in taking a preventative and proactive approach to your eye health. One of the many ways we do this is by offering bulk...

meganazulejo: here's one: www.ebay.com/itm/Pentax-PK-Lens-Olympus-PEN-F-FT-FV-Camer... Originally posted 77 months ago. (permalink) TimVo (a group admin) edited this topic 77 months ago.