Archived posting to the Leica Users Group, 1996/04/15

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Subject: Re: 100mm/2.8 R APO Macro question
From: (C.M. Fortunko)
Date: Mon, 15 Apr 1996 22:09:12 -0600


How would you compare this lens with extender to the performance of the
200mm Telyt on Visoflex?


>Am a new owner of subject lens and want to add 1:1 magnification capability.
>The dedicated Elpro unit is the obvious choice and will offer a ratio of
>1.1:1. The APO-Extender, however, used with the same lens yields a 200/5.6
>which can focus continuously from infinity to 1:1 ratio. Though more
>expensive, the Extender would offer more flexibility (greater film plane to
>subject distance and greater focusing range), not to mention the ability to
>use it with other R lenses.
>Question is, which approach yields the best results at 1:1? Any hands-on
>comparisons would be appreciated.
>       --
>       Roger Beamon,  Natural History Interpreter & Photographer
>                                 Docent: Arizona-Sonora Desert Museum
>                                 INTERNET:

C.M. Fortunko, Ph.D.
Group Leader, Materials Characterization (853.05)
National Institute of Standards and Technology
Materials Science and Engineering Laboratory
325 Broadway
Boulder, CO 80303

Voice phone:(303)497-3062      FAX:(303)497-5030

Replies: Reply from Bill Christensen <> (Re: 100mm/2.8 R APO Macro question)