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EdZ
Professor EdZ
   
Reged: 02/15/02
Posts: 12561
Loc: Cumberland, R I , USA42N71.4W
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Re: Pentax 20x60 PCF WP II (Prisms undersized)
06/07/08 10:44 AM
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Quote:
If it is tending toward lozenge shape then that's an indication of undersized prisms.
No, that would be an indication of tilt in the prisms. You can have cats eye shaped prisms even if they are not undersized.
There are several methods we have already clearly outlined for testing effective aperture. Those are the methods to check for undersized prisms.
edz
-------------------- Teach a kid something today. The feeling you'll get is one of life's greatest rewards.
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