I own an RD-1, I use a CV21 routinely on it and I also use the 12mm CV lens
on it. Sean Reid, didn't bother testing the lenses on a film camera and
measuring the vignetting. Those lenses vignette on film camera as well. I
use a 14mm f/2.8 on a Nikon film camera and it vignettes. The only
difference is that the electronic camera packages offer correction which
corrects the artifact.
This link has some of my observations of the RD1.
<a style='text-decoration: underline;' href="http://www.tlianza.com/epsonRD1.html" target="_blank">http://www.tlianza.com/epsonRD1.html</a>
With respect to the issue of telecentric lenses: The word "telecentric" is
thrown around alot, especially by folks who don't do lens design. You
wouldn't want to own a telecentric design and they aren't generally
available for photographic purposes. A true telecentric design limits the
field of view and it requires relatively high f numbers to avoid huge
lenses. The design trend in these digital lenses is towards highly
asymmetric designs with the aperture stop as far from the focal plane as
possible. Movement away from symmetry about the stop requires quite a bit of
computation to minimize aberrations in a fast lens and it generally requires
aspheric elements to the correct aberrations. The 35mm F1.4 summilux is
and the CV 35 f 1.7 are excellent examples of lenses that illustrate this
trend (Note that the front element of each of these lenses is concave, not
convex.)
The 12mm lens on the RD-1 represents a worst case scenario and frankly, it
isn't bad at all.
--
Tom Lianza
Director of Display and Capture Technologies
GretagMacbeth LLC
3 Industrial Drive
Unit 7&8
Windham, NH 03087
603.681.0315 x232 Tel
603.681.0316 Fax
"Stacey" <fotocord.TakeThisOut@yahoo.com> wrote in message
news:3cbdbeF6mu0seU1@individual.net...
> J.Scheimpflug wrote:
>
>> "Stacey" <fotocord.TakeThisOut@yahoo.com> wrote in message
>> news:3cb8mgF6kda6rU1@individual.net...
>>
>>> The problem is trying to use rangefinder lenses on a digital sensor. The
>>> epson used with wide lenses has already shown to have problems. This is
>>> the
>>> reason Leica hasn't gone there, they know it won't work very well.
>>
>> Are you referring to Zeiss' literature regarding their new lenses for
>> digital work?
>
>
> No I was talking about the epson and regular film wide lenses
>
<font color=purple> > <a style='text-decoration: underline;' href="http://www.luminous-landscape.com/reviews/lenses/rd-1-lens.shtml</font" target="_blank">http://www.luminous-landscape.com/reviews/lenses/rd-1-lens.shtml</font</a>>
>
> and Leica's position of why they haven't made a digital body for their
> rangefinder lenses. These are so far removed from being "telecentric" they
> just don't work well with digital sensors. Normal 35mm SLR lenses are
> close
> enough to work well being retrofocus in design.
> --
>
> Stacey<!-- ~MESSAGE_AFTER~ -->
>> Stay informed about: RIP Contax? 
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