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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Easy tool to correct geometry of photographed document

I know there is already an answer to this question on either photo.SE or something about imaging SE but after trying gazillions of search terms and word combinations until exasperation (and of course ...
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2 votes
4 answers
379 views

How can I ensure that a lens is pointing absolutely vertically downwards?

My uncle makes models of all sorts of things. To help him, he uses his camera(s) as scanners by photographing his various bits, and then performing further CAD on the resultant images. These models ...
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Beginning photographer wants advice on how to shoot Alaskan Cruise glaciers and wildlife [closed]

I have a Rebel T3i with Canon zoom lens EF-S 18-55 mm lens 1:3.5-5.6 IS ll and a Canon EF-S55-250 mm f/4-5.6 IS STM lens. I would appreciate any advice on how to get clear photos and video on our ...
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6 votes
3 answers
260 views

What can I do with a broken lens?

I had a little accident with my camera the other day: please don't let your camera on the roof of your car and then drive your car. Now my lens is broken. It's an old Yashica lens, it comes from the ...
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1 answer
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What is this mystery Vivitar lens mount?

I was given a box of old lenses by a friend, and came across only one that's different. It's a Vivitar 135mm f/2.8 auto lens. I'm not familiar with the lens mount. After comparing both Nikon ...
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2 answers
156 views

Buzzing Noise and error 01 canon camera

Hi I have a canon rebel T3 have a canon 75-300 mm lens. When i lock the lens in and turn on it starts to make a buzzing noise and I get error 01 when I try to take a picture. I try to take pictures ...
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2 votes
4 answers
1k views

Are most (if not all) lenses' focal length described as the 35mm equivalent? [duplicate]

2 thoughts made me ask this question: Different lens looks different on the different-sized sensor and has a different 35mm equivalent Many normal and wide-angle lenses' optical center is not ...
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1 answer
104 views

Screw on teleconverter lens

I have a D5100 with a Sigma 50-200 but I also have a a 2x and 3x teleconverter lens. The problem is that the teleconverters are screw on. Is there an adapter for this?
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1 answer
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How to get rid of lens flare from lightbulbs?

I’m using a Sony a6500 with 10-18mm f4 lens at 10mm f8. How do I fix the blue flare around the lightbulbs? https://imgur.com/a/QkiLTnt
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2 votes
2 answers
183 views

Tamron SP 500mm mirror lens changing aperture and DOF

Please help me understand. I have the above F8 mirror lens. I know the difference between F stop and T stop. I have measured this T stop experimentally it is higher than F8. The DOF feels very narrow ...
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2 votes
1 answer
76 views

Tips for buying modern used lenses

First, some may say this is a duplicate of What should one look for when buying a used lens?, but I see it more as an update or complement for modern lenses. I'm interested in buying a used modern ...
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3 answers
224 views

How does crop factor apply on lenses? [duplicate]

I understand that the crop factor of a sensor multiplied by the focal length of the lens equals the focal length of an equivalent 35mm lens. Also, there are well known differences between wide, ...
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0 answers
32 views

Z-mount lens on F-mount body [duplicate]

I have a Nikon D810 DSLR, which has an F-mount body. I also accidentally got an Nikkor 24-70mm Z-mount lens. I am wondering if there is a way to use the Z-mount lens on the F-mount body? I have been ...
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0 votes
1 answer
152 views

The pics taken from my canon 18-135 mm zoom lens are blurred

When ever I take photos in my canon lens during zoomed out they are of good quality and sharp but when ever I take photos that are far or somewhat near to me i find them to be blurred and lack of ...
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0 votes
1 answer
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How do I remove this white "corrosion" from my lens ring?

I've purchased a new Sigma lens recently and everything is great about it except some white "corrosion" around the lens ring. Is it possible to safely remove it and restore the original look ...
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3 answers
380 views

How can I choose a lens to improve my landscape and portrait photography?

I have an entry level DSLR ( Canon EOS 2000D). I would like to buy a lens for my camera to complement my current 18-55mm kit lens. In particular, I am interested in landscape and portrait photography. ...
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2 answers
125 views

How do sensors "focus" on the bottom of the lens (flange distance)?

I know that when a camera sensor is used with a lens there is a specific distance between the sensor and bottom of the lens (aka "Flange distance" or "flange focal distance") in a ...
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Mount Vivitar series 1 to Nikon D50

I'm considering purchasing a Vivitar series 1 650-1300mm lens for my Nikon D50 as I'm interested in getting better photos of wildlife from far away. Can someone direct me to the correct adapter ring ...
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0 votes
1 answer
72 views

HANIMEX Automatic Zoom Lens C- Macro 1:4.5 F=80-200mm

Could anyone tell me what camera body this lens will fit please? It's been packed away with my dad's old Praktica SLR but it doesn't seem to fit that. It's a "HANIMEX Automatic Zoom Lens C- Macro ...
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Is there a negative numerical aperture(NA)?

[Collimated beam - Negative lens] Can this situation call negative NA? or Is there a exist any negative NA situation? Thanks
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What do the letters signify on Panasonic lenses, eg LUMIX S, G, H [duplicate]

I was looking for a lens and saw two similar lenses on amazon, one significantly more expensive, which was the Panasonic LUMIX H-H025E-K 25 mm vs the Panasonic H-XA025 Leica DG Summilux I tried to ...
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Nikon telephoto zoom ring turns but Lens won’t extend

Nikon telephoto lens zoom ring turns but will not extend lens but will retract it if I manually extend the lens! What is causing this and is it something that I can fix myself?
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1 vote
2 answers
108 views

How do I determine the focal length of a simple meniscus lens empirically?

I have a camera (Bolta Photavit IV) with a simple reverse Galilean finder that is missing the rear element (this is a common problem, they fall out). If I have a complete finder and disassemble it, ...
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0 answers
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Is there an adapter made that I can use my MC/MD lenses on a Ricoh XR-20sp RK/PK mount and still use all the functions [duplicate]

Minolta x700 SR/MC/MD mount Ricoh XR-20sp/KR-20sp
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1 answer
215 views

Zoom at 200mm with Nikon AF-S NIKKOR 70-200mm f/4G ED VR Lens

I finally got my hands on a Nikon AF-S NIKKOR 70-200mm f/4G ED VR Lens (with D810 as the body). Before this lens I had a Nikon Nikkor AF-S G ED VR 24-120mm f/4.0 AF-S VR ED G Lens with the same body. ...
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0 votes
1 answer
116 views

What differentiates Canon EF(S), EF-M, and RF despite flange distance and pins?

I understand that EF is for full-frame SLR, EF-S is for APS-C, RF is for R series mirrorless camera, and EF-M is sort of a failed (or at least, not as successful) transition between the 2 above. They ...
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0 votes
1 answer
129 views

Super zoom lens vs Nikon Coolpix P1000 [duplicate]

I know the question is not well posed, but I was thinking for shooting the moon, distant wildlife, and macro photography can I compare the following setups? Nikon D810 + 70-200mm f/4G VR Nikon ...
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0 votes
2 answers
99 views

How does FOV persist at a distance?

I recently was wondering about a music performance video that used some very strange tricks that I couldn't find an explanation for. Below shows one perspective of the music performance: It appears ...
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2 votes
2 answers
201 views

Image blurred at edges when zoomed in too 55mm lens 18-55mm canon

I teach photography and one of my students images, all shot at 55mm (18-55mm canon kit lens) have a blurred vignette. Any advice? I have attached the images and the metadata enter image description ...
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Capturing License Plates From 50-100 ft (And Night)?

I'm attempting to build something with a Raspberry Pi that can hopefully capture moving vehicle's license plates 50-100 ft away (and at night). I understand very little about photography, but through ...
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1 vote
1 answer
180 views

How to keep the aperture of an adapted Nikon G lens open?

I would like to leave my lens fully open all the time without having to find an aperture converter. But other than bluetac I cannot find anything that would attach to my Nikon lens and leave it ...
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1 vote
2 answers
78 views

Will there be noticeable vignetting with 86mm filter ring stepped down to 82mm?

I'm about to buy a Meike 8mm Cine Lens for my BMPCC 4k (which has a 2.0x crop factor) in the M43 mount variant. The filter thread size is 86mm, but my only Pro-Mist and ND filter thread sizes work ...
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0 answers
128 views

Is Nikkor AF-P 18-55mm better than AF-S 18.140mm for video and sharpness?

I've had for a long time old 18-55mm AP-S lens and it's been crap of the lens honestly. It came with the kit with camera and very quickly I bought few other lenses. The lens that I got used so much ...
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0 votes
1 answer
110 views

If I zoom in 2x in my photo is that the same as having twice as long of a lens? [duplicate]

If I don't have access to a 200mm lens but I have a rather high resolution camera. Does that mean if I zoom in 2x in my photo and half the mega pixel, I can achieve the same reach with a 100mm lens? ...
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0 votes
1 answer
242 views

Camera sensor and sun

I'm a new photographer and yesterday someone told me that I should never point my camera (I have a mirrorless camera) toward the sun as this can damage the sensor. I went back and checked and I saw ...
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0 votes
1 answer
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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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2 votes
1 answer
116 views

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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1 vote
4 answers
143 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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1 vote
3 answers
151 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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3 votes
6 answers
3k views

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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2 votes
2 answers
118 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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3 votes
3 answers
613 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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0 answers
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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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2 votes
2 answers
134 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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0 votes
1 answer
190 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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0 votes
2 answers
258 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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1 vote
2 answers
254 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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1 vote
1 answer
150 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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0 votes
1 answer
155 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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1 answer
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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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