Archived posting to the Leica Users Group, 2001/02/07
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]And if you print the negatives full frame to an 8x10, do you get the same DOF? You most certainly will get different image sizes on the print. I will put it even simpler. If John Collier follows your advice and wants to know what DOF he can expect out of a 45mm lens focused at 3 meters in a full negative 8x10 print. You are saying it is completely irrelevant if I make the negative with either a G2/45mm, a Mamiya 7/43mm or large format/45mm Grandagon-N? Just curious, John Collier > From: Jim Brick <jim_brick@agilent.com> > > Many folks use a roll film back on their LF cameras. Let's say you have an > 8x10 camera. You take a photograph on 8x10 Tri-X film. Now you slip in a > 6x7 roll film holder and take another photograph on 120 Tri-X film. Nothing > has moved. Same camera. Same lens. Nothing tweaked. > > Guess what! > > The DOF of both the 8x10 and the 6x7 images are exactly the same. Same > image size. Same lens. Same aperture. But the 8x10 obviously has more > coverage. But the same image size. Hence the same DOF.