[Leica] RD-1 unuseable lenses

[Henning Wulff <henningw@archiphoto.com>]

At 10:15 AM -0500 3/12/04, LRZeitlin@aol.com wrote:
><< In the preliminary review of the RD-1
>
><< http://www.dpreview.com/news/0403/04031101epsonrd1.asp >>
>
>there is a statement that the camera cannot be used with the 50 mm Elmar 3.5
>or the 50 mm f2.0 DR Summicron (along with a few other lenses).
>
>Why not?>>
>
>Sonny Carter replied:
>
><<Because of the extension of those lenses behind the mount. ??>>
>
>Sonny,
>
>That can't be the case because the last glass element of both lenses is well
>in front of the mount. At least on my 50 mm Elmars and Summicrons. It must be
>some other arcane reason.
>
>Larry Z

Not really. Remember, the Bessa R2 at present has two shutters. They 
might remove one on the digital model, or maybe not. Then, the 
digital sensor typically has quite an optical sandwich in front of 
it. The sum of these items might well cause the 50 Elmar to touch the 
shutter. It seems fairly clear from the list of other lenses (SA, 
first 28 Elmarit, etc) that this is the reason. The only thing that 
all these lenses have in common is that they come very close to the 
Leica cloth shutter, which is located much further back than the RD-1 
shutter will be.

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    *            Henning J. Wulff
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