Archived posting to the Leica Users Group, 1999/02/01

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Subject: Re: [Leica] Enlarging lens
From: "Joe Stephenson" <joeleica@flash.net>
Date: Mon, 1 Feb 1999 13:21:18 -0700

Dear Bob,
Thanks for the note. No, I have no experience of Leica enlarging lenses. I
am not an expert, and would welcome an expert's opinion. As I said, I'm
getting better enlargements than ever I got before using the Rodagon lens.
It would tough to get me to switch, although I'm sure Leica enlarging lenses
are good, too.
As to the use of apo lenses for black and white. I have read that apo offers
advantages in B&W printing because of the apo's lenses ability to focus
light of three (rather than two) wavelengths on exactly the same plane. If
some wavelengths of light are focused at a point behind or ahead of the film
plane, the result will be a fringe or halo around the area of sharp focus
produced by the properly focused wavelengths of light. When printing color,
the result will be a color fringe around objects. In B&W one will see
monochrome fringes. I have seen claims that apo is more important in B&W
printing than in color printing, but without a rationale that made sense to
me. Again, let's hear from someone with definitive knowledge.
Sincerely,
Joe Stephenson
- -----Original Message-----
From: RBedw51767@aol.com <RBedw51767@aol.com>
To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us>
Date: Monday, February 01, 1999 12:02 PM
Subject: Re: [Leica] Enlarging lens


>Thank you Joe for the note and please pardon my ignorance.   I have regular
>Rodagons (50 & 80) and they are excellent.  It is my understanding that
there
>isn't much difference between what I have and the APO Rodagons unless one
>prints color.  I have been told that the APO really does improve color but
has
>little or no affect in B & W.    I print B & W exclusively and have no
>interest in printing color.
>
>Have you actually used the Leitz enlarging lenses?  Your comments are very
>interesting and if true would probably save me some money.  I look forward
to
>hearing from you.
>
>Bob Bedwell
>
><< I'm surprised that no one has mentioned the 50mm APO Rodenstock
enlarging
> lens. It is the best enlarging lenses I've used and it cost only $360.00,
> used. It produces great images, and is at a level of quality that would be
> difficult to significantly surpass at any price.
> SincStephensonerely,
> Joe >>
>