Archived posting to the Leica Users Group, 1997/10/07

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Subject: Re: OFF-TOPIC; Blue filter enlarging stuff
From: Dan Cardish <dcardish@microtec.net>
Date: Tue, 07 Oct 1997 21:38:57 -0400

At 06:36 PM 07-10-97 +0100, Joe Berenbaum wrote:
[snip]

>...I'll be reporting on this problem in much more detail in a few months
>time in this magazine. Meanwhile I suggest you run a careful focus check on
>any lens you're considering buying, if you print with VC papers. I'd look
>especially carefully at lenseswhich I report as having larger-than-average
>amounts of longitudinal chromatic aberration in the visible spectrum."
>
>Interestingly, in this article's top ten lenses test results, the Rodenstock
>Apo-Rodagon N 50mm/f2.8 has "worse than average red-green longitudinal
>colour." Fascinating...
>
>>
I recall these articles in Darkroom Photography, but I have the 50/2.8
Apo-Rodagon, and use a cheap Patterson grain magnifier with benefit of a
blue filter, and I never get unsharp prints with VC papers.  I guess I'm
lucky.

Dan C.