On Saturday, December 13, 2003, at 06:40 PM, Pschings@xxxxxxx wrote:
The way I understand what Olympus (and Schneider and Zeiss) are saying
about
problems with older lenses used with digital sensors, they wouldn't
expect you
to see a problem with the S2, because the sensor is only using the
central
part of the image circle. The problem comes with wide angle lenses
used on full
frame sensors. I have read many reports of chromatic aberration
problems when
the Canon 1Ds is used with superwides, just like Olympus (and
Schneider and
Zeiss) claim.
Except that Olympus makes the claim for the 4/3 system not full frame.
Per your argument it would be OK to put OM lenses on the E-1 because
the edges of the image are thrown away. Oly says no, no. Special
digital lenses needed. Don't want to spoil our reputation with those
old OM lenses. It is interesting that Leica which dotes on the quality
of their equipment, deservedly, says rangefinder lenses will not work
because of the tiny lens to film distance and they will not produce a
digital M camera. But they have no problem producing a digital back for
their SLR.
There is an additional factor with digital that no one talks about.
Everyone is looking at little strips of image at 200 percent and
looking for digital artifacts. What they are ignoring is that those
same FF wide angle lenses that produce chromatic aberration on on
digital also produced it on film. But people ignored it along with the
grain.
And if it is difficult to produce a super wide angle lens for a 35mm
camera that does not vignette or produce chromatic aberration at the
edges think about how much harder it is going to be to perform that
trick for a lens with half the focal length to get the equivalent on a
4/3 camera. A 17mm equivalent lens is going to have to be 8.5mm. How
exotic is that? And how expensive?
Winsor
Long Beach, California, USA
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