Hi John,
I guessed this one would get you going.
A little bit of reading for you.
http://micro.magnet.fsu.edu/primer/l...ctionhome.html
http://micro.magnet.fsu.edu/primer/j...icdiffraction/
This is something I knew nothing about a few weeks ago, but obviously it is something equipment reviewers are aware of. I have been through DPR camera reviews looking at the sample pics and noticed that all have been taken within that particular models diffraction limit.
I think here we may be seeing something of the differences between digital and film. Film grains having a radom spread where as digital sensor is a grid with micro lenses directing light into wells. I will do a graphic later of what I mean. Could well be wrong though.
Don