Chris Beaumont wrote:
Something that hasn't been discussed yet (AFAIK and I've read most of this monster thread)
18MP on APS-C, won't diffraction start to kick in at about f/5.6 or something ridiculous? According to TDP the 50D starts to 'suffer' from f/7.6 and smaller.
It has been mentioned (in another thread?), and there is nothing ridiculous about it. For images with the same FOV, same perspective and same DOF, at the same print size, the amount of diffraction is independent of sensor size. Meaning, if you don't want diffraction, you have to sacrifice DOF, and that is universal for the wavelengths of light.