Originally posted by VoiceOfReason How bad would diffration hurt an APS-C sensor in 24mp size?
Why are you concerned with
pixel sharpness?
What matters is the
image sharpness. For a given sensor size, a particular f-stop will always produce the same image-level diffraction, independently of the MP.
Worrying about the effect of diffraction at the pixel level is like worrying about noise at the pixel level.
Yes, higher MP sensors have higher per-pixel noise (everything else being the same). But the
image-level noise is the same.
As a matter of fact, the higher MP sensors have a finer grain pattern (once images are scaled to the same size). Likewise, increasing resolution with more MPs is possible even when the diffraction limit has been passed. An image chain does not work according the "weakest link defines the maximum"-principle. All individual link performances multiply so every improvement helps (to a degree that is naturally also determined by other links).