On Mar 1, 2006, at 4:48 PM, Rob Studdert wrote:
I really wish someone would do the 21x28mm format I proposed with the
sensor technology available now. I think it would be a very good
balance in cost and quality. The FoV numbers are pretty nice too,
with given lenses.
Generally less waste of available lens coverage too.
Sheesh, I must be procrastinating because I'm dreaming about this
with too much work to get done...
I was figuring that if you could get 135 pixels per mm (somewhere in
the 50-60 [EMAIL PROTECTED] resolution) as a target, that size sensor would be
about 2835x3780 pixels with 0.0075x0.0075mm photosite area. That's a
10.7Mpixel camera with photosite size closely approaching the Canon
5D (roughly 121 pixels per mm, or 0.0082x0.0082mm photosite area) ..
something like less than 15% difference in photosite area, so well
within a third of a stop on sensitivity, all else being equal. Less
chance of the corner/edge problems with old lenses than with the
24x36mm sensors, higher resolution so it would take advantage of even
better quality glass more effectively.
And the biggest plus is that effective pixel to print area for the
vast majority of popular larger prints (11x14, 16x20, 20x24 ..) is
closer to 100% rather than tossing out 20% of your pixels due to
cropping. Sure, bazillions of people love 4x6s. 4x5s can be made on
the same machines with very little change.
Sigh. I really have to get back to work.
Godfrey
