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 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net

