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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3answers
589 views

Camera Lense effect on the physical camera

I was watching a video of pixar teaching how physical cameras work. Now two things are important for my question, first the number of light beams that can go through the small aperture and secondly ...
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2answers
43 views

Raw therapee lens/geometry correction Sony a6100

I recently bought my first "real" camera, a Sony Alpha 6100 (Sony ILCE-6100). I select that both, .jpg and .arw should be stored. When I compare the .jpg and the .arw picture the geometry looks a bit ...
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2answers
153 views

Calibrating a lens…is auto focus less reliable when zoomed?

So, I'm calibrating my lenses to a new camera body, a 5D Mark IV. When calibrating my 70-200 ƒ2.8 (version 1), I found that the focus was accurate at 70mm. However, when I calibrated it at the 200mm ...
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1answer
99 views

What is the mount on this Sigma lens? It is smaller than Canon EF

I just got a SIGMA 17-70 1:2:8-4 DC (C) lense. Mount looks very much like Canon EF (S) but it's smaller. Added a foto from a 70-200 EF to compare. Anybody knows what this mount is for? Many thanks in ...
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1answer
103 views

What is the mount on this Beston lens?

Bought this lens cheap at an estate sale, but now I'm trying to figure out the adapter I need to get it to fit my Rebel XS body. I've looked at dozens of pictures on the internet, but cannot narrow ...
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5answers
3k views

What are the differences between these lenses and how will they affect a beginner?

My father is giving me his Canon 50D and Canon EF-S 17-85mm f/4-5.6 IS USM lens. I noticed that most kits on the market come with the EF-S 18-55mm f/3.5-5.6 lens and I'm considering it instead of ...
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4answers
516 views

Wide angle lens vs. kit

I have a 18mm -55-mm 'kit' lens with my Nikon D40. Is it effective as using a 24mm true wide angle lens for indoor real estate photography?
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1answer
71 views

Troublshooting constant whirring sound from 70-300mm Canon Lens

I have a Canon Rebel XTi with a 70-300mm lens. About 6 months ago, it started making a constant whirring sound every time I connected it to the camera. The whirring sound occurs even when (1) the ...
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2answers
303 views

Will the lens for a D30 fit a 5d mark ii, iii, or iv?

Will the lens for a D30 fit a 5d mark ii, iii, or iv? I'm upgrading my mums camera and want to make sure.
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3answers
236 views

What is the necessary recess on an enlarger lens board?

I have recently acquired a Meopta Belar 75mm/f4.5, to use with my Durst M605 enlarger. I was remiss in not checking the mount of this lens (M23.5) before I bought it, and have therefore ended up with ...
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2answers
134 views

Is my Nikon 18-200mm 1:3.5-5.6G lens with broken front glass beyond repair? [duplicate]

My lens broke somehow. I didn't drop it as far as I remember, but the cause of the drop isn't really the point... a part of my lens broke, and my lens cap is stuck to it. Is my lens a goner? Can I buy ...
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1answer
169 views

How much does it cost to repair a dropped 70-200mm f/2.8 lens?

I just dropped a 70-200 f2.8 lens and the images are pretty washed out and blurry. I am really sad about it since I just borrowed it from one of my friends for the weekend. The exterior of the lens ...
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1answer
216 views

Newborn photography - Lens for crop Nikon D7200

I want to start photograph newborns. But know I am pretty comfused which lens would be good on my Nikon D7200 crop camera.? Everywhere i look for information all suggestions are for full frame camera. ...
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1answer
58 views

angenieux 14 x 8

Can anybody point me to a place online with information on this piece. I am trying to determine value for a client for estate purposes. Thank you in advance. Other marks Serial #1526825. F.8.112 MM....
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1answer
48 views

Are sensor swabs (used but good, or new) and fluid a good choice for internal element cleaning?

From experiments, it seems that lightly-used sensor swabs (that are NOT contaminated with oils or abrasive particles) make reasonably good internal lens element cleaners and dryers (they are actually ...
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1answer
81 views

What is causing Samsung NX1000 to report “No lens fitted”?

I have a Samsung NX1000. I am getting a no lens fitted sign on the screen. It is the correct lens that came with the camera. The focus also seems blurred. What could be the problem?
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1answer
109 views

How good is the Nikon 70-300mm lens that comes along with the Nikon D5600?

I'm planning to buy a new camera (Nikon D5600) and it turns out that they have two variants. One of the variants come with the usual 18-55mm lens and a 70-300mm telephoto lens. The build as per me, as ...
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4answers
177 views

Second lens after Nikon 16-80 mm: Nikon 50 mm f/1.8g or other? [closed]

I know that comparing lenses is a subjective and often futile effort, but I hope that if I convey my priorities and current understanding (as a relative beginner), I can still gain a lot of insight ...
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2answers
43 views

How will a coating defect affect my images

I have rented an RB 67 and the 90mm lens it came with seems to have a very visible defect on the coating of the front element. How is this likely to affect my images? And what sort of scenes/lighting ...
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3answers
154 views

Does the autofocus system look through the lenses?

I have a doubt about the effect of putting a filter (polarizer, UV etc) on the autofocus system. In theory, a lens which is put in front of the lens will affect the focus (we must set a different ...
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2answers
163 views

What's the best choice of lens from an optics surplus shop to get a Stanhope Lens-like magnifying function?

I am looking to do some experiments with my cellphone and a lens, holding the lens in contact with my cellphone lens. I'm looking for a lens that has the shortest back focal length length possible, so ...
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1answer
155 views

Why does aperture change when I zoom my lens even in manual mode? [duplicate]

I have my Nikon D7500 set to Manual Mode. I can change the shutter speed and it maintains the setting. When I change the aperture, the setting is not maintained and varies depending on the zoom of ...
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1answer
124 views

Using a Sony E mount lens on a Nikon body? [duplicate]

I was just wondering if it's possible to use a Sony E mount lens on the Nikon D3200 by using an adaptor? I recently got given a Sony lens for free so I dont want to get rid of it.
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0answers
35 views

Opticam 135mm 1:2.8 lens repair

I'm working on repairing the aperture of this lens I picked up really cheap as a "lets see if I can" sort of project and I've hit a road block to getting the aperture out of the lens. Basically under ...
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5answers
301 views

How to prevent lens cap from being put on backwards?

Today, I tried to take a picture with my wife's camera, and when I was done I went to put the lens cap on, but the outward part was facing the lens, and now the lens is scratched. Very, very expensive ...
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2answers
290 views

Why doesn't lens focus after turning focusing ring while set to autofocus?

My brother tried my new camera and was turning the focusing ring quite harshly on auto focus. (50mm canon lens) I’ve read multiple similar questions but nothing is quite what I mean. Ever since my ...
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2answers
99 views

What type of 3M vinyl should I use to protect the body of my lens? [closed]

I bought an expensive lens which I would like to aesthetically protect in order to keep its resale value high. This means that I want to minimize the chances of any scuffing, scraping, or scratching. ...
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1answer
72 views

What is behind this symmetric coma like effect, and literally odd-ball bokeh, in a triplet lens?

The example picture, shot with a vintage triplet (Staeble Kata 45mm/f2.8, wide open, on APS-C, no further crop), shows a curious shape of coma-like cross pattern in the right- and leftmost sculptures -...
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1answer
314 views

I have made the lens dirtier than before cleaning it. How can I recover from this? [duplicate]

After some testing, I determined that there was some dirt on my 18-50mm lens. Here is the photo of a white wall with my 18-55mm: You can see the settings of above photo here: Here is the same wall ...
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0answers
161 views

Kit lens on an Olympus OM-D E-M10 Mark II not being recognized?

I have an Olympus OM-D E-M10 with the kit lens, which reads Olympus 14-42mm 1:3.5-5.6 EZ ED MSC 0.2m/0.66ft-∞, and for some reason today, when I turn it on, the lens goes in and out (zoom) ...
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2answers
271 views

Is the Nikon AF Zoom-NIKKOR 80-200mm f/2.8D ED Lens a good Martial Arts lens for the Nikon D7500?

Let me try again. I am not sure how people know about the unpublished differences between lenses with the same specifications, or age/compatibility, due to my unfamiliarity with lenses and it seems ...
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1answer
81 views

Which Nikon DSLR and third-party lenses should I buy? [closed]

I was torn between the D5600, T6i, T7i, and D7500 bodies, but when I held the T7i and the D5600 the Nikon had a hugely better handfeel. There was no D7500 to hold and while it is faster I am leaning ...
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2answers
131 views

Blur image with a 1/2“ lens on a 1/3” sensor

When I put my 1/2" lens on my 1/2" sensor, the image is perfect, but when I put the same lens on my 1/3" sensor, everything is very blur, even when I focus at maximum, so I need to put an extension ...
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2answers
78 views

Aperture and the understanding of how it works [duplicate]

So over black friday I bought this bundle, which is the Nikon D3500 two kit lenses. I was wondering, I keep hearing people talk about aperture and using F11-F16 but on those lenses that I have, all I ...
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1answer
68 views

How to perform lens shading correction given downsampled lens shading map

I'm working with the HDR+ Burst Photography Dataset. The burst RAW images are provided in DNG format. For each image, an additional low-resolution floating point lens shading map (encoded as .TIFF) is ...
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2answers
130 views

I dropped my 15-45 mm lens [closed]

I own a Canon Eos m3 with a 15-45 mm lens. Yesterday, when I was changing the lenses for the first time, I accidentally dropped the lens. From around 1 meter, on stone tiles. :( I checked it and it ...
2
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1answer
363 views

How to figure out the order of lens elements in the rear group?

I bought a second-hand Canon 100D after I got into photography this summer, and got to use a vintage lens that was still attached to my dad's Pentax ME Super (Asahi Pentax-M 50mm 1.4 SMC, a great step ...
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3answers
215 views

Reason for offset in lens/sensor and tripod mount?

I have noticed that my Canon Powershot G11 tripod mount is more in the center of the body of the camera and not aligned with the lens/sensor. Is there a reason for this? My concern is that as I rotate ...
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3answers
157 views

Lens for 1/2“ sensors, installed on a 1/3” sensor

I want to install a lens built for sensors 1/x" (with 1 <= x <= 3), on a sensor 1/3". I need to have an horizontal field of view of "a cm", when my working distance is "b cm". What is the ...
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4answers
3k views

Is it safe to push a lens to retract it?

I have noticed. Instead of twisting the zoom ring on my 18-135 DX F3.5/ F5.6 G ED. I can instead push it to the camera to retract the lens using the lens hood as a "handle" How safe is this "...
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1answer
136 views

What is Canon RF control ring?

Canon RF lenses have a new feature: a control ring. What is the control ring and what can be done with it?
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3answers
91 views

Canon 100mm f/2.8L with raynox 250 diopter or canon 65mm mp-e?

I am having trouble deciding between these two lenses for insect photography. Please help me decide! Edit: I’ll be taking pictures of live insects using a flash with a soft light diffuser. I probably ...
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2answers
100 views

Will many tiny scratches on lens front element affect my photos? [duplicate]

I've bought a second hand Helios lens online (40 years old). At first sight everything looks fine no fungus haze no dust. Under 45 degree the front element in covered in very very thin scratches like ...
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1answer
38 views

Olloclip Macro 21x lens for iPhone able to shoot objects far away?

Can Olloclip Macro 21x lens for iPhone be used for shooting objects far away? (note: amateur in photography and lenses seeking help from experts)
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2answers
79 views

Emulate Shutter Duration on RAW Photos using Exposure Stacking

So I've been on this problem for about a year now and haven't been able to solve it. I gave up on it a while back, but now I'm researched up and ready to get an answer. I'm trying to fake a long ...
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3answers
412 views

Safety of storing camera resting on lens/resting on back?

I recently bought a Canon EF-S 55-250mm F4-5.6 IS STM for my Canon T7i. This lens is significantly heavier than previous lenses that I've owned and I'm concerned with how I can safely store the camera ...
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3answers
198 views

How to find out what part of image is less lens-distorted?

I'm developing an application which uses a Canon DSLR to sequentially shoot an object from different views. Often the object is too big to fit in frame so I have to make more than one series of photos....
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3answers
143 views

Is fungal growth still common with modern lenses?

I've been reading up on how to avoid fungal growth in camera lenses. I came across an article that suggested that fungal growth is uncommon in this modern time because the construction of lenses have ...
17
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5answers
2k views

What are the benefits of the classic f-number scheme?

Classic ƒ numbers are entrance pupil diameter as a fraction of focal length. This seems like a slightly strange choice as exposure is proportional to area rather than diameter. Naively I would think ...
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2answers
1k views

How do I choose between 24-105mm and 24-240mm zoom lenses for the Canon EOS R system? [closed]

After a couple of years with my first DSLR (a Canon T6), I’m thinking about joining the MILC world with the Canon RP (affordable, full-frame-sensor, mirrorless). I like to take pictures while ...

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