Archived posting to the Leica Users Group, 1999/04/27
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Henry Ambrose wrote: > > Is there a depth of field chart for Leica M lenses? snip > Is there a published document that contains this > information? Or can this > only be determined by testing? Henry, I have a "Depth -of-Field Tables for Leica M and Leica R lenses" Ernst Leitz Wetzlar GMBH 110-057 h dt./engl./frz. IX/83 (september 1983) It is very detailed. You will have the formulas for close-up photography in German, English and French, and the DOF tables for the following focals: 19,21,24,28,35,40,50,60,65,70,75,80,90,100, 135,180,200,250,280,350,400,500,560 and 800mm. All the tables have been calculated with a circle-of-confusion of 1/30 mm, and the figures have been rounded off for convenience. Example of DOF available: 50mm distance setting in meter only: 0,5-0,6-0,7-0,8-0,9-1-1,2-1,5-2-3-5-10m = and infinite. F/stop: 1-1,2-1,4-2-2,8-4-5,6-8-11-16-22 = Ex.: 50mm at F:5,6 and 0,9 m =3D between 0,86 and 0,95 m or 75mm at F:1,4 and 1,5m =3D between 1,48 and 1,52m or 50mm at F:1 and 0,9m =3D between 0,892 and 0,908 m :-) I don't know if Leica still provide a DOF table. On the Web: - - Contax G User Pages <http://www.novia.net/~jlw/contax/> Download this free, simple depth-of-field calculator dial covering Contax G lenses from 21mm through 90mm. Fitting all five lenses onto one dial means the calibrations are a little coarse, but it should be good enough for approximate estimates. The dial is in Adobe Acrobat PDF format -- open it in Acrobat, print it, cut out the two pieces and assemble them. If you need a more comprehensive dial, see the item below about the Rodenstock Studio Calculator. - - Another possible source for a depth-of-field calculator, this one in the form of a slide-rule chart. It's called the FotoSharp Depth of Field Guide; ordering information is available at <http://members.aol.com/Photoinfo/index.html> Lucien