Originally Posted by neuroanatomist
Erm, if the diagonal is 1.6 times larger, both the width and height are 1.6 times larger, so the area is 2.56 times larger.
(Which figures, the pixels themselves are nearly twice as large on the 5DmkII than on the 50D, and 1.4 times nearly twice as large pixels gives something a bit below 2.8 times the area.)
Surmak's calculation is correct, because it divides both the horizontal and the vertical resolution by 1.6.
The answer to the original question can also be given as follows: If the distance to the subject and the focal length are the same, then, as long as the subject fits within the cropped image of the 50D, the coverage in number of pixels will always be larger on the 50D because of its higher pixel density.
Regards, Colin
Reply With Quote