Re: [Leica] Vignetting of Summicron M 2/28mm ASPH

["Don Dory" <dorysrus@mindspring.com>]

Phong,
I was implying that if an element was moved out of it's designated location
+/-0.003 then bad things happen to the light.  The designs coming out of
Solms are fabulous, but there are continuing occasional tales of really bad
results, sometimes flare, sometimes severe vignetting, sometimes not as
crisp as supposed to be.  The only logical conclusions would be either an
element out of spec or an element out of place.

The +/- comes from one of Erwins bulletins when he was talking about the new
retro 50 and how it conforms to muck tighter specs than the other 50
Summicrons he has tested recently.

Thanks for reading.

Don
dorysrus@mindspring.com

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