« on: November 01, 2014, 02:00:05 PM »
I shoot a D800 and my conclusion on this issue is that the notion that you have to buy new lenses is nonsense. You may choose to if you plan to crop heavily and want to maintain sharpness at the maximum achievable with the sensor, but in no way does image IQ suffer with existing lenses at even moderate crops as compared to the IQ of images from current lower MP sensors - there is no "loss" of IQ. I've printed ~2'x4' landscape panos shot with the 16-35 f/4, a nice but not awesome lens, with the most amazing details. I do typically shot landscapes on a tripod, but I did before I got the D800. Same for 13x19 portraits and other works.
High MP may not be for everyone, and the files are large and a tad slower to work with than images half the size, and you will want a fast computer and some ram, but I think when Canon comes out with their offering that you will find it will produce amazing images, cropped or not, with your current L lenses, regardless of whether Canon tries to convince you otherwise.