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Re: [OM] MTF Lens tests

Subject: Re: [OM] MTF Lens tests
From: Winsor Crosby <wincros@xxxxxxxxxxxxx>
Date: Mon, 22 Jul 2002 16:19:13 -0700

I found a key in one of the Color Foto pages that answered by
question. Dotted lines are tangential and solid are sagittal.

Interesting that the 200/5 comes off better than the 200/4 in this
kind of test when it is usually used because of its light weight and
small size in spite of not being considered quite as good as the
200/4.  The choice of wide open and 2 stops in seems to penalize fast
lenses.  The 21/2 which most tests and experience indicates is
superior to the 21/3.5 comes off worse.  And then it is compared to a
slow Leica and a slow Zeiss superwide and also does not do that well.
One would guess that the 21/3.5 would come out about the same as the
Leica and Zeiss.
--
Winsor Crosby
Long Beach, California

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