Originally posted by ogl Maybe I'm poor in English, but...it's absolutely nonsense.
Explain us, please, how to get the same photo in terms of DOF at APS-C camera
as you can get with FF camera + 50/1.4 wide-opened.
Or with FF + 31/1.8 wide-opened, or with 43/1.9 wide-opened.
Did you not read my post at all, or did you just read the first sentence and jump to post?
A given lens at a given focal length, subject distance and aperture will
always produce the same image no matter what is behind it. The image is produced solely by the lens and therefore the DOF has
nothing to do with the sensor. An image is nothing but projected light rays. This is a very simple fact that should be incredibly obvious.
An FF sensor does not have "magical blurring capabilities" any more than film did. Explain how a piece of 36x24mm chemical coated plastic (film) would somehow change anything about the image as opposed to cutting that piece of film up into a piece of 24x16mm chemical coated plastic?
The reason why FF appears to have shallower DOF at the same magnification is because you are
standing closer to the subject to get the same magnification. If you stand in that very same spot with an APS-C camera, the lens will produce the
same image with the
same DOF, but the APS-C sensor is only recording a smaller portion of it.