Hi All, A recent thread about digital macro left me feeling awfully confused. I think I am missing something very fundamental.
Suppose you have 3 negative formats: 35mm, 3.5mm and 35cm (originally it was 35mm vs digital, but I think taking it to the extremes makes things more clear). You shoot the same subject (an bug, 30mm long). It would fill the 35mm frame at 1:1 mag, 3.5mm at 1:10 and 35cm at 10:1 (one probably needs a microscope for this :) Now, if you blow up this ant to 8x10", in each of these three formats, would you get a larger DOF with 3.5mm neg than with 35cm one? Also, if you shoot the 3.5mm portion of the ant (leg?) with the same lens (say, 100mm, 1:1) on each format, and blow up the part of the neg with the subject to 8x10", would you see any difference whatsoever between the formats? And finally, what would give you better result (in terms of the final image), the ant filling the frame, in 35cm or 3.5mm? I have heard a lot of "shallower DOF" in the larger formats vs, say, 35mm. But unless I am grossly mistaken, that has to do to the DOF on the neg, not on the final print. After being blown up to the same size, it should be the same, no matter what the format is, isn't it? Please, enlighten me. Mishka LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
