Quote Originally Posted by George Slusher


Now, get the same perspective--i.e., distance--and the same framing, by changing the focal length. We could use either camera as the standard, so choose the 5D.


5D, 100mm, 50 ft, f/2.8: 44.3 - 57.4 ft, total 13.1 ft, 5.7 ft in front, 7.4 ft behind


30D, 63mm, 50 ft, f/2.8: 41.5 - 62.9 ft, total 21.5 ft, 8.5 ft in front, 12.9 ft behind


So, to get the same DOF along with the same perspective and framing, the 5D would have to be stopped down to f/4.5, as before.









And this is because DOF/bokeh is amplified by the focal length and thus to reduce that you stop down right?