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re: [OM] FYI - all the 35 mm lenses tested by photodo, in order by Grade

Subject: re: [OM] FYI - all the 35 mm lenses tested by photodo, in order by Grade (m
From: Tom@xxxxxxxxxxxxx
Date: Mon, 17 Dec 2001 11:09:39 -0500
On Monday, December 17, 2001 at 11:16, Thomas Bryhn 
<olympus@xxxxxxxxxxxxxxx>
wrote re "re: [OM] FYI - all the 35 mm lenses tested by pho" saying:
...
> There are two ways I can think of that would make testing at infinity
> possible: a) Parallell incoming rays, checking point size in focal plane. b)
> Point source in focal plane, checking the spreading of the light bundle
> coming through the lens.

Yep, they use an optical bench.

tOM
------------------- http://groups.yahoo.com/group/ottawa-
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tOM A. Trottier,        ICQ:57647974    http://abacurial.com
        758 Albert St, Ottawa ON Canada K1R 7V8 
        +1 613 860-6633 fax:231-6115    N45.412 
W75.714
"The moment one gives close attention to anything, 
even a blade of grass, it becomes a mysterious, 
awesome, indescribably magnificent world in itself -- 
Henry Miller, 1891-1980


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