Quote:
Originally Posted by robski
As stated by nirofo DOF is related to "distance of image to film/sensor in relation to image magnification and F stop used regardless of which lens you use".
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Quite agree that for a given f-stop, if you keep the magnification constant, the focal length does not count. But, if you keep the distance to subject constant, the DoF gets smaller as the FL gets longer (and the magnification changes).
If you're going to keep magnification constant, the FL doesn't count. If you're going to keep distance to subject constant, the FL does count.
As I said, it all depends on what the intended subject matter is.