Archived posting to the Leica Users Group, 1999/06/13
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I have recently been considering replacing my old 35mm Summaron f/3.5 with the new Tri-Elmar. This, with my other lenses, would give me a good range of focal lengths: 21, 28-35-50, 90. However, on closer inspection, I noticed that the Tri-Elmar does not have the familiar Depth of Field markers around the focus indicator. This is common amongst zoom lenses that use a ring for zooming. When I am shooting outdoors in sunlight, I often set my aperture, and then crank the infinity mark over to the the DOF mark for that aperture. Then I don't need to bother focusing, and I know I am getting the maximum depth of field for the circumstances. Is there any simple way of retaining this capability when the lens is missing the DOF marks? Is there a simple "compute in your head" formula (I am only interested in where to position the infinity mark)? Mike - -- Michael Chmilar chmilar@acm.org