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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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
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1answer
114 views

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, ...
0
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2answers
164 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 ...
0
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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 ...
-1
votes
2answers
469 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 ...