184mm F/.9 Industrial CRT Lens by Lenzar Optics
Moderators: rjlittlefield, ChrisR, Chris S., Pau
That looks very good. I have some Repromasters but not that one.
However, since you are using it as a tube lens, in a fixed position, it has no relevance to the telecentricity of the system. It would be the 10x objective that is making the system telecentric. This happens also with the 10x Mitutoyo, for any 200mm tube lens.
However, since you are using it as a tube lens, in a fixed position, it has no relevance to the telecentricity of the system. It would be the 10x objective that is making the system telecentric. This happens also with the 10x Mitutoyo, for any 200mm tube lens.
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It's a pretty fun toy to have, field curvature is probably going to be significant, since the CRT screen is curved as well.
Just like the CRT-Nikkor 55mm f/1.2 lens, it is probably extremely poor outside the dedicated magnification. The Nikon one is extremely sharp wide open, a fun lens to play with. It is optimised for 1:4 (or was it 1:5?) reproduction ratio.
Just like the CRT-Nikkor 55mm f/1.2 lens, it is probably extremely poor outside the dedicated magnification. The Nikon one is extremely sharp wide open, a fun lens to play with. It is optimised for 1:4 (or was it 1:5?) reproduction ratio.
This doesn't behave much like that CRT lens. The telecentricity is remarkable, and I did not notice strong field curvature. Lots of more modern CRT screens were flat, unless my memory is fooling me. An internet rumor says these replaced the Repro-Nikkor, not the Nikkor CRT lens, in the oscilloscope-photographing application.