F. Craig Callahan wrote: > The issue of what happens to image sharpness when enlarged seems to me > somewhat tangential, since then we're talking about a lot of variables, > including the resolution of the printing paper, the sharpness (and focus) > of the enlarger lens, viewing distance, etc.
Hardly tangential if one is trying to determine an acceptable CoC in the negative from an acceptable CoC in the final image. Viewing distance is part of the equation; the other variables certainly affect final image quality, but they don't directly affect the choice of CoC. > My response is that if he's not happy with the aperture/DOF chosen by the > camera, he's not selecting the proper points of focus for DEP 1 and DEP 2. Not necessarily true. He may know exactly which points he wants to define near and far limits of DoF but desire a smaller CoC than Canon's 0.035 mm. Changing near and far points is the hard way to effect a smaller CoC. Jeff Conrad * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
