Quote Originally Posted by neuroanatomist
Bottom line is that the display is 640x480, and since the aspect ratio of the LCD on these cameras is not 3:2, the image fills the width but not the height. So with a 7D's 5184 pixel width viewed at 10x, those 518 pixels are interpolated up to 640 pixels, i.e. 1.23:1, and with the 5DII's 5616 pixel width, viewing at 10x means 1.14:1. I'm not sure what algorithms Canon uses for the interpolation, but regardless, upscaling is bad for sharpness.

I don't mean to complain, and I'm sure the Canon guys have their reasons... but I wonder why the heck they don't just make it view 1-1? I mean, the whole point of 10x is to judge sharpness. Why not design it so it does that as well as possible?