Quote:
Originally Posted by Wavytone
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Perkins Elmer did for example produce a 5-element lens 20cm clear aperture f/5, though in current $ you wouldn’t have much change out of $1M, and it required a crane and truck to lift/move it.....
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I have one of those . Well part of one
- a 10kg or so 275mm diameter planoconvex lens element from the Perkin Elmer 916mm focal length f/4 surveillance camera used in spy/surveillance aircraft and satellites.
Just waiting for an interesting project......
Best
JA