Archived posting to the Leica Users Group, 1996/06/01

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Subject: Re: ASPH vs Aspheric
From: "Roger L. Beamon" <>
Date: Sat, 1 Jun 1996 12:46:06 -0700 (MST)

At 11:38 AM 6/1/96 -0700, Eric Welch wrote:
>At 12:03 PM 6/1/96 -0500, you wrote:
>>I bought a 35mm /f1.4 ASPH and liked it very much until I took some pictures
>>in the mall of a shop that had small christmas lights hung all over it.  I
>>was shocked to  notice triangular flare on the lights near the edges and
>>corners!! I shot it again and same result.  Bought the lens new with
>That's coma, and is a common situation with most, if not all, high speed
>wide-angle lenses. Stop down a bit and it goes away. Only bright lights at
>the corner that are so small see to cause this problem with every wide angle
>lens I've ever owned. Just noticed it with my EOS 24mm lens the other day.
>It also happened, to a lesser extent, to my 35 Summilux R.

In light of Leica's own words with respect to this lens, in their
literature, i.e. "virtually coma free", that's a disappointment!
       Roger Beamon,  Natural History Interpreter & Photographer
                                 Docent: Arizona-Sonora Desert Museum