Great review, Bryan!





Just one question, though:


Increasing sensor density lowers the DLA (Diffraction Limited Aperture)
by magnifying the diffraction effect - making it more visible.
This number is the result of a mathematical formula that approximates
the aperture where diffraction visibly starts affecting image sharpness
when viewed at 100% full-size on a display (which is what a high
percentage of site users are doing to evaluate their gear)


I can totally understand that flaws in the optics (like diffraction) are more visible within a 15 MP image than say, a 12 MP image. But, why are do we compare 100% crops from the T1i with say, an 12 MP Xsi image? Shouldn't we observe these crops at 80% with the T1i, and 100% with the Xsi?


The same goes for noise - Shouldn't crops be observed at 80%, and then compared?


Sorry if this stirs debate - I'm sure Daniel Browning will be on this soon[]