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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
98 views

Which lens is best for athletics?

So I am an athletics photographer, and I have a dilemma. First off, I use the 5d mark II body. Currently I own the 100-400mm f/4.5-5.6 USM II and I LOVE it... except for indoor photos. Before I ...
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2answers
444 views

Projector Design and lenses

I am working on a project where I need to project a single image onto an object, Originally I was looking at the digital projector route but due to cost and complexity this has been ruled out. I found ...
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1answer
287 views

Can anyone help identifying this (close-up or what) lens?

T-mount on one side and something strange (similar to Arri PL? on the other)?
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1answer
100 views

How can I do 4x5 rise/fall movements with super wide angle lenses?

I'm looking for super wide angle lenses, ideally 50mm and below. I'm only interested about decent rise/fall movements because I do mostly architecture, and I'd like to be very close to the subject. ...
2
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1answer
329 views

Why is my Nikon 18-300 lens not focusing at higher focal lengths?

I found a similar question about the 18-200. Someone suggested screwing the front element tighter. Is it possible to do the same with the 18-300? My problem happens at 200-300mm. I am not sure how to ...
1
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1answer
565 views

Camera showing incorrect used focal length in EXIF data

Using a Canon 5D Mk2 with a 17-40mm f/4L lens. Everything seems to work just fine, except no matter how i shoot, the EXIF-data will show 40mm as the used focal length, even if I know the image is ...
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1answer
47 views

Can I use a lens with aperture ring on an adapter that has its own aperture ring?

I want to use a Helios 44K-4 58mm f/2 on my Sony A6000. I found an adaptor with aperture ring, but the lens already has an aperture ring. Can I use it anyway? This is the adapter: K&F Concept PK/...
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1answer
83 views

Lens recommendation for tiger photography

I am planning to take a photography tour in India to photograph tiger and other animals. What lens would be recommended for such purpose? I am canon user and have 5d mk iv with 100-400 IS I. I have ...
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1answer
160 views

Why does my adapted f/2.8 lens make very dark images in manual and action mode?

I'm using a Sony A7 II with adapter with a Canon EF 24-70mm f/2.8L and a Canon 16-35mm f/2.8L both with the same settings, but the exposure on the 24-70mm is darker in the manual and action modes, but ...
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1answer
87 views

Stuck lens off - scared to reattach another lens

I managed to get my 50mm lens off my camera (it was stuck) and it looks like one of the lens pins was broken. I'm scared to reattach another lens. Was it the camera body that was making the lens stuck ...
2
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0answers
332 views

What are the different types of auto-focus motor and how do they compare?

What is the difference of ultrasonic motor, stepper motor, and electromagnetic drive? Which one of these are lens-based or screwdrive? What are the advantages of lens-based servo over screwdrive and ...
2
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0answers
519 views

Nikkor 28-70mm F2.8 lens problem: AF and aperture don't work

I bought this lens second hand from someone who has no idea about this kind of thing. The price WAS low, but not low enough to justify a broken lens. It has no glass scratches and at 300£ it seemed to ...
1
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0answers
77 views

Using Nikon PS-4 bellows to copy 35mm negs

I want to digitize my old b&w negs, and have an old PS-4 bellows unit to use on my Nikon D5200, an SLR with a DX format sensor. My PS-4 manual predates DX, and shows a table with lenses from 20mm ...
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0answers
47 views

Is it a fungus or something else?

the following picture is from my dad's Konica Hexanon f/1.7. Would you call the white layer a fungus, haze, dust or something different? Thanks
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0answers
45 views

What are the underlying causes of artifacts seen with anamorphic lenses?

When a camera with an anamorphic lens shows some artifacts, they are usually either an oval bokeh (vertical) or a lens-flare steak (horizontal). How much of these artifacts are due to the "anamorphic ...
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0answers
55 views

M12 cut IR filter quality?

I want to get a few quality filters for M12 type dash camera from China, however I know nothing about filters so need someone to tell me how/what to order? Is the barrel on M12 lenses the same ...
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0answers
3k views

What is the impact of changes between the old and new Nikon 18-300mm lens?

The lenses I am considering are: Nikon AF-S DX NIKKOR 18-300mm f/3.5-6.3G ED VR Lens (new) Nikon AF-S DX NIKKOR 18-300mm f/3.5-5.6G ED VR Lens (old) As far as I can tell the only differences are: ...
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0answers
22 views

Should change body or glass

ive been using a nikon d3100 body and the stock lense that came with it. ive been looking at new bodys, but ive also been looking at lenses. the body ive been looking at is 24 mp opposed to the 14 on ...
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0answers
27 views

Nikon D7100 with Nikkor 18-55 mm lens not working

When I put on my 18-55mm Nikkor lens on my D7100 camera, no information shows up on the display area in automatic. If I switch to manual the f-stop is on 0, it will take a pic but it is black. My ...