Does anyone want to have a stab at estimating the practical
diffraction limit for the K10D? My *ist D resolution seemed  drop off
from about f16, so I assume for a Bayer filtered sensor the practical
limit would be something like twice the airy disc diameter plus a bit
to account for the AA filter?

The *ist D sensor has 7.8µm square photosites so the aperture to
produce an airy disc of twice that is f11 plus one stop fudge. Given
that the K10D sensor has 6.05µm square photosites applying the similar
factors would yield a drop in resolution after about f13.

I haven't done any serious comparisons as yet but I'll be keen to see
if the theory fits the practical.

If you think it's all a crock then you are quite entitled to your opinion :-)

-- 
Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
UTC(GMT)  +10 Hours
[EMAIL PROTECTED]
http://home.swiftdsl.com.au/~distudio//publications/
Pentax user since 1986, PDMLer since 1998

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