You'll notice that few digicams go wider than 35mm 'equivalent'. And you'll
also notice that at that not so wide focal length, even the high end cameras
have a fair amount of chromatic aberration.
Apparently, since CCD sensors work best with light perpendicular to the
chip, quality falls significantly as the angle of incidence becomes more
acute, which is what happens with wide angle lenses as you move out from
the center of the image. No doubt this problem is even more severe with the
retrofocus designs used on wide angles for SLRs.
I think we will be using film for the highest quality wide angle images for
some time to come, at least until a different sensor chip technology comes
along - or a better collimator design.
Chip Stratton
cstrat@xxxxxxxxx
> Interestingly enough, the sensor size is 36x36mm, but it's being released
> as a medium-format back, so the wide-angle issue remains the
> same. Is there
> something about the structure of digital sensors which means that they
> can't cope with extreme wide-angle lenses?
>
> Alasdair, who is hanging on to his 21/3.5 Zuiko...
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|