I am asking this out of ignorance because to me if cropped cameras had same technology as FFs, crops seem to be better deal. I am reading a lot of positives about the 5D, but is all that due to it's advanced technology? Or does being full frame allow it to have the superior IQ (and stuff) in first place? If you put the technology behind the 5D into a cropped camera (let's say an imaginery 90D), will this cropped camera take same photos as 5D? Or the question can be, what if you move a crop sensor into the 5D? Will it take the same quality photos?