Archived posting to the Leica Users Group, 1997/03/13
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 06:55 AM 3/13/97 -0400, you wrote: >What, if any, practical effect does the aperture setting of a enlarging >lens have? If you print a negative at f/16, will you have a greater >"depth of field" in the sense that if the negative is not perfectly flat >in the carrier, that area of the negative will print sharper than if you >printed the same, not-perfectly-flat negative at f/2.8? > >You are correct about the depth-of-field. However, diffraction (a lens aberration) of the image increases as the aperture becomes smaller resulting in less sharpness. F8 is the best lens aperture for most 50 mm enlarging lenses. Use your timer to adjust the exposure instead of the aperture. Glen Robinson