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

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

Henning,
I was mostly thinking of one of the aspheric elements forward or backward in
space.  Perhaps I am naive, but I think up to two stops vignetting in the
corners doesn't bother most people.  What was described was a severe hot
spot in the center of the image.  I don't think that even an unpainted
portion of the lens barrel could cause a hot spot in the center; such a hot
spot would move around the frame depending on where the source of light was
coming from.

One of my underlying assumptions in this whole discussion was that the
original complaint was a real visible problem.  Over the years, I have
gradually realized that there is usually some basis of fact to reported
problems.  There is, of course, the occasional troll that throws gasoline on
a lighted match.  That is usually pretty rare.

Don
dorysrus@mindspring.com

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