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Petri lens optical schemes available somewhere?
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PostPosted: Tue Nov 25, 2014 8:28 am    Post subject: Petri lens optical schemes available somewhere? Reply with quote
Hello,

Are optical designs of petri lens available?

They look quite interesting, for example 55/1.4 rear element diameter is 35mm!
I have taken some of them apart, 200/4 has 2 lens (air spaced) front element and 3 lens (2 glued together and 1 air spaced) rear element.
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