Re: [Leica] Summicron M 2/28mm ASPH performance flare/vignetting photos

[Henning Wulff <henningw@archiphoto.com>]

At 8:43 AM -0700 5/19/03, Mark Rabiner wrote:
>"Y. Li" wrote:
>>
>>  Hi Jim, they are great! Do you have other images made with Summicron 28mm
>>  ASPH? I have bad experience with my one. Please have a look at:
>>
>>  http://www.photo.net/photodb/folder.tcl?folder_id=306074
>>
>>  Y. Li
>>
>
>I think one of the elements are in backwards.
>I'm not kidding. Have heard of that happening.
>Gotta send it back. Too much St. Pauli Girl during lunch.
>

 From what I've seen of the pictures, that's not unlikely. Or an 
element has been left out.

It's a bit hard to see from the pictures, as the contrast seems to 
have been cranked way up to highlight the light falloff and the 
pictures are too low res to comment on the corner quality, but if the 
corners are severely soft or mushy, there might indeed be a problem 
with an element.

In that case, I'd like to retract my previous comments on light 
falloff not being a QC problem. I thought of QC in the context of 
slight misalignments or poor seating of elements, not of one being 
left out or in backwards. :-(

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    *            Henning J. Wulff
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