Questions tagged [lens-design]

Of and relating to the specifics of lens construction and manufacture.

5 questions with no upvoted or accepted answers
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2 votes
1 answer

Are internal focusing primes actually uncompensated varifocal lenses?

If I shorten the focal length of a lens without taking any other measures, that will reduce the required flange distance for infinity focus - meaning that if the actual flange distance is not changed, ...
2 votes
1 answer

Are "moustache" distortions in rectilinear ultrawides the result of a fisheye+pincushion construction?

If I wanted to try and build an ultrawide, I guess I would try building a fisheye first, then try tearing the frame back into shape with a group that introduces pincushion distortion. The kind of "...
1 vote
0 answers

Why won’t the aperture adjust on my Sony A camera?

I recently bought a telezoom objective without built-in AF. I did not bother because my camera has an AF which could handle the focus on such lenses. I always had used lenses with built-in AF so I did ...
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1 vote
1 answer

What lens would suit an A4 large format camera

I'm planning on building a scanner camera. The principle of which is simple: everything's built like a large format camera, except the film is a simple scanner controlled by computer. Now, building ...
-1 votes
2 answers

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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