Questions tagged [lens]

A photographic lens is used to focus the light onto film or a digital sensor. Many cameras have interchangeable lens systems, allowing the photographer to choose the type of lens to use.

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4 views

How do older AF Nikkor CPU lenses measure the selected aperture to provide data for the camera?

I have a semi-faulty AF Nikkor 50mm ƒ/1.8 lens (early non -S or -D model, with the focus distances in a little window) that has been having issues communicating with the camera. Both my F-801 and my ...
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Aperture Doesn't Change on Nikon D7000 1.8D (Already set ring to 22)

I have a Nikon D7000 and I recently purchased a used 50mm f 1.8D for it. I am unable to get the aperture of the lens to change. It seems to stay stuck at completely open version of the lens (1.8f). ...
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127 views

Decrease FF lens focal length for use on APS-C and still have it focus?

Need to convert very cheap vintage FF 50mm f/2.8 lens to work as 35mm lens for for APS-C, for having wider angle of view. Its kind of works by simply placing lens closer to camera sensor (without ...
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138 views

Does the focal length on cropped lenses include a crop factor? [duplicate]

I'd like to be certain about the focal length written on the cropped lenses, e.g. I have a Sony NEX-5N with the original OSS 18-55mm kit lens. Is it actually an 18 to 55mm focal length with no "...
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Do smartphones suffer from degrees of chromatic aberration? If so, how is it possible?

Smartphone imaging sensors are usually Bayer sensors which have a color filter array on top of each pixel, so each pixel ultimately captures one of red, green or blue colors of light. In that case, ...
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98 views

What’s wrong with my Canon EF 85mm 1.2 lens?

It squeaks when I try to focus and sounds like metal against metal. And it won’t focus on Manual mode. The outside is in great condition but the ring for focus is loose and wobble's. It’s like it is ...
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567 views

Is aperture the same on different format of lenses?

I have just acquired a large format lens (a Schneider-Kreuznach Angulon 1:6,8/90) for the first time, coming from 35mm and medium format, and I am a bit puzzled by its aperture. I want to make sure I ...
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Samyang 10mm F2.8 UNKNOW ADAPTER? [duplicate]

I want to use this Samyang 10mm F2.8 lens on my fujifilm X mount camera. What kind of adapter I need to mount on my fujifilm X mount? Was used with a sony nex adapter: After a searching on the ...
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107 views

Using a MFT mounted lens on a full frame camera

A long time ago, I bought 4 Rokinon Cine DS lenses with the MFT mount for my Panasonic GH5. Link to one of them is below. https://www.amazon.com/gp/product/B00MZCCDA6/ However, since then, I have been ...
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178 views

What are the lenses with FOV 90-100 degrees for 23mm diagonal sensor ? and their mount name?

What are the lenses with a FOV 90-100 degrees (approximately) for 23mm diagonal sensor ? Is there any norm name for this kind of sensor or any named mount, to which is associated image-circle and ...
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233 views

Can taking up-close photos of multiple candles stacked together damage my iPhone’s camera/camera sensors?

My brother took multiple up-close pictures of a stack of burning diyas (a type of candle); to the naked eyes, the candles looked very bright. Can such up-close photography damage my iPhone’s camera, ...
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212 views

Canon 60D accessories fit to 6D mark 2?

I am a beginner of photography. I bought second hand canon 6D mark 2. I wonder if all those lenses and accessories of canon 60D are capable to use for 6D mark2? If those fits, I will buy those full ...
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1answer
143 views

A spot on the lens inside the camera

Hello! Is there someone who has experience with this kind of "spot-on-the-lens" stuff? :) I bought a used 35 mm camera and discovered a "spot" on the lens inside. Of course, it ...
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110 views

Is a Nikon AF-S Nikkor 50mm f/1.8G lens compatible with a Nikon D3100?

Can I use autofocus in Nikon D3100 body with Nikon AF-S Nikkor 50mm f/1.8G lens? If possible then how? I have recently bought one but can't use autofocus. The camera is showing me lens is not attached....
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What are these focal lengths for Sigma Nikon Optimization Pro for 14-70mm F2.8 OS HSM A017?

I've been calibrating my Sigma lenses using the Sigma Optimization Pro application and the doc hub, for instance, the 24-70mm F2.8 DG OS HSM A017 Nikon version. In order to do so, I take photos at ...
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179 views

Motion tracking/VFX: How to get needed info for iPhone camera?

Basically, I want to do VFX with my iPhone SE 2nd Generation front-facing camera. The software being used is Blender up-to-date. I'm not sure what to set Blender for in the track camera settings field,...
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1answer
59 views

M50 Mounting maximum weight [duplicate]

I have a canon m50, and an adapter + 55-250 f4 lens, the total weight of the lens and adapter is 500gram, is it safe to install a tripod on the camera body, because my mount adapter is broken
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177 views

How can I remove spots on my lens?

I have noticed there are lots of spots on the outside of the 1st optical lens on my Ef-S 18-200mm lens. They are not scratches and look more like marks left by dried condensation or water droplets. ...
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87 views

Choose lens for Olympus OM-1n

I just got an Olympus OM-1N since I decided to play with analog photography. It came with the regular 50mm f/1.8 lens which is quite fine for many occasions, however I realized that I need a wide-...
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2answers
136 views

Does it exist?: a Coronagraph-style LCD panel mask inside the optical lens to pass dark and block bright pixel segments?

So we know coronagraphs are just a circular mask in the center of a telescope to block the sun's bright light and allow our eyes to see into the dark around the sun. But what if this coronagraph could ...
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What are these strange lines that are visible at sunset?

I see those lines, you see on the picture, on my iPhone 7 jumping random on my display while taking pictures. It was sunset right in the sea in Zakynthos. I would like to know what that is.
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134 views

Is this a lens bubble?

I have a Minolta MC Rokkor-SG 28mm f3.5 that I recently bought. The lens is free from any fungus or haze and event a scratch almost in mint condition. But there is some kind of speck of dust on the ...
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70 views

Canon 40D ERR 01 lens error on manual only- is hope for the lens lost?

I am a high school teacher working with a donated canon 40D to loan to students for projects. A student wants to shoot manual mode on the camera, but the lens (Canon Ultrasonic EFS 17-85 mm) won't ...
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125 views

Nikon Ai 300/4.5 - remove lens hood

I am not quite sure what has happened here, but ...: After having been out in the rain and using my Nikon Ai 300mm f4.5 lens, I just tucked it away in my camera bag and forgot it there. It was ...
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3answers
197 views

Dust inside lens result incomplete images

There is a peak of dust inside my lens( Canon 100-400mm 1st gen). And I can find a dot on some of my images( I have no idea why I didn't find it on other images). And is there anything that I can do ...
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54 views

AF-S NIKKOR 17-35mm 1:2.8D - Viewfinder shows F-- on D3500 with and without locking at highest aperture still shows F--

Following the advice from here Why is my Nikon 50mm f/1.8 giving me an fEE error? I locked the aperture at F22 using the orange lock. I just attached a this lens to a D3500 camera body, and while the ...
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4answers
327 views

Does the Canon EF 100mm f/2.8L work on the Canon 250D (SL3) camera?

I'm learning the basics of photography and I am wondering if the "Canon EF 100mm f/2.8L" will fit my Canon 250D (SL3) camera? I searched online but was unable to find anything clear. My main ...
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4answers
267 views

Lenses/camera recs for documenting art

I have an art project that I need to document and could really use some help picking a lens and possibly a camera for it. I did the documentation process a long time ago when I was applying to art ...
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5answers
508 views

Telephoto lens for camera whose lens cannot be removed

Is it possible to add a lens in front of another lens to make it a telephoto lens? I have a few "fisheye" adapters that I can put in front of any lens to take a fisheye photo, but I wonder ...
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295 views

There are many f2.8 zooms for FF. Why are there so few f2/f1.8 zooms for APS-C?

APS-C/Super35 cameras are less staple for film than they were before, but are still widely used. Besides, there are quite a few semi-professional APS-C DSLRs on the market. As far as I understand, a ...
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184 views

Bought "Mint" lens from Japan, but then I see this

I just received a supposedly "mint" Nikkor 28mm f2.8 AIS lens from Japan. It sure does look unused, but when inspecting the rear element I found this stuff: The smaller spot near the top ...
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6answers
218 views

What size lens will give a 2ft by 2 ft view at a range of 2 ft?

I was considering getting a 35 or 50mm lens or similar and am not sure how to choose the right one. Cannon 60d.
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1answer
121 views

What does 1: in Canon Zoom Lens EF-S 18-55mm 1:3.5-5.6 IS II mean? [duplicate]

I noticed that in the front of my lens (CANON ZOOM LENS EF-S 18-55mm 1:3.5-5.6 IS II) where the it's name is printed, that it contains 1:3.5-5.6 which is the widest aperture you can set at 18mm and ...
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2answers
172 views

FD lens aperture is slow

I bought a Canon AE-1 Program on eBay along with a 50mm f/1.4. The camera works well with other lenses, but the 50mm's aperture seems slow. Moving the bayonet (I think that's what it's called) takes ...
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4answers
213 views

Can the spatial distortion of wide-angle photographs be reversed?

I’ve been window-shopping online for a house recently and find that almost all the pictures posted by real estate agents are wide-angle shots, sometimes extremely so. That got me wondering if there's ...
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1answer
208 views

Why do these images have a dark semi-circle on the left side?

I shot these images with my Sigma 24-70 and Sony A7iii, in fog, sometimes pointed into the "sun" (it was not actually sunny but sometimes the lens was pointed towards the direction of the ...
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1answer
89 views

My Canon PowershotSX260 HS shows an error message

I accidentally droped my Canon PowershotSX260 HS while I was using it. The camera's lens was still extended but the camera looked like it just powered off. I tried pushing the power button, but when I ...
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3answers
174 views

How can I get rid of shadows generated from light source behind object of interest?

I am work in research and I have a areascan basler camera and objective that I am using to track the deformation of an object under load. I have attached an example image shown below. I am looking ...
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4answers
1k views

What's the practical difference between two Canon 50mm f/1.2 L lenses?

I've got an RF 50mm f/1.2 L lens for my R system. I've recently been playing with an F-1, and picked up the FD 50mm f/1.2 L lens. Obviously some of the different size is the autofocus and other ...
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1answer
237 views

Is there an EF version of the Canon EF-S 60mm macro?

I take a lot of photos of faces. For the last 12 years or so, I've been using a Canon EF-S 60mm macro lens on an EOS 7D. I just upgraded to a Canon RP full-frame. With an adapter, I can mount the EF-S ...
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3answers
471 views

two identical lenses with different coatings

Me and my friend both own the Nikon 24-70mm F/2.8G lens. When we met today I put my camera on the table next to his. We noticed that the front element of our lenses must have different coatings ...
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2answers
243 views

Telephoto Lens Advice for Canon

I use a Canon 600D and currently have three lenses: EFS 18-55mm A very old 50mm Pentax I use with adapter A very old (1970s?) Auto Super-Paragon 200mm f/3.3 I use with an adapter I want to get more ...
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66 views

What are these numbers below the distance scale of my lens?

On my Canon EF35mm F2 IS USM (my first prime lens ever which I just bought used) there are the numbers 22, 11, [line with red dot], 11, 22 written below the distance scale. From the manual of the ...
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2answers
345 views

Help! Auto-focus not working on Manual Mode but working perfectly fine on Auto Mode

I just bought and received a brand new Canon EF 24-70mm II USM lens. Already there is an issue. The autofocus works perfectly fine in Auto shooting Mode but will NOT work in Manual shooting Mode. This ...
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395 views

How do I fix my Tamron 18-200's autofocus issues with my Nikon D3100?

I'm using a Nikon D3100 with a Tamron 18-200. I purchased this lens from eBay, it is brand new. The owner says he never used it and kept if for almost 2 years without using it. At 18mm the lens won't ...
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4answers
177 views

Do chromatic aberrations change with distance?

I just saw the following claim on an amazon review and can't make much sense of it. Chromatic aberrations after 10 meters become significant. After 15-20 meters the picture becomes unusable. Is ...
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1answer
294 views

Help me find a lens with peculiar bokeh

I want to take portrait pictures with an artistic look of flowers. Therefore Im looking for an vintage lens with peculiar bokeh. I have seen some images taken with older lenses with very ...
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1answer
80 views

Dust on the sensor vs. in the lens? [duplicate]

I have an old, used Panasonic LX100 (Point and Shoot) that I plan to use as my main all-use video camera. I just started noticing that dust spots are visible in the image on apertures larger than ...
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1answer
81 views

Do Program and Shutter priority modes work on a Nikon N90s with a Series E lens?

I have a Nikon N90s camera body. Will a Series E 1.8 Nikon lens work on this body in the P and S modes? If so are there any restrictions and if so in what mode?
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1answer
187 views

Is my camera infected with fungus?

I am new to this forum. I just wanted to ask if this is fungus in my lens and how worried should I be? I am just using this lens with my Nikon F3. Is it possible that my camera got infected? I don´t ...

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