So the first one gets closer by a factor of 438.5/330.6= 1.325 and not sq(5472x3648/3968/2976)=1.3.0 upvotesBy yabokkie (Nov 1, 2013)I get your point. there is an error from the using of diagonal angle of view, which introduces about 2% of error between 4:3 and 3:2. (1) pixel angle of view (horizontal = vertical) diagonal AoV = 12.347 deg for bothhorizontal (3:2) = 10.273 deg, 0.001877 deg per p