Archived posting to the Leica Users Group, 1999/04/24

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Subject: Re: [Leica] polarizers
From: Eric Welch <>
Date: Sat, 24 Apr 1999 08:24:03 -0500

At 11:40 PM 4/22/99 -0700, you wrote:
> Any wide angle lens that
>covers an angle greater than 90 degrees may create a problem.

Yes, he's right. And on top of that, when you get into very wide lenses, 
like the 19 or wider, light travels so much farther through glass at the 
corners than in the center that distortion occurs. Thus the reason why 
Leica won't put filter threads on the front of lenses wider than 21.

Eric Welch
St. Joseph, MO

Canadian DOS prompt: EH?\>