Archived posting to the Leica Users Group, 2009/08/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Jim- Thanks for doing this work. Will keep it in mind when I use the lens again. Stasys ---- Jim Nichols <jhnichols at lighttube.net> wrote: > > Sent: Monday, August 03, 2009 5:48 PM > Subject: DOF Using the Elmarit-R 60/2.8 in Macro Range > > > I realize the several LUGGERS have and may still use the Elmarit-R 60/2.8 > Macro. This lens is new to me, and the DOF in the macro range (below 20 > inches) was a surprise to me, though, if I had really comtemplated the > issue, I should have expected it. In short, the DOF at near distances is > very limited. > > To evalulate what I was dealing with, I started by using some very wild > interpolation of the distance and DOF scales on the lens itself, plotted > the data, faired out the obvious errors, and arrived at a table of values. > I then set up a quick experiment with the camera and lens, a tripod, > yardstick, and colored pins. The photos show me that the table is fairly > accurate. > > I am submitting the table for comments and for the enlightenment of anyone > else currently using this lens. > > DOF TABLE > (all dimensions in inches) > > Distance f/22 f/16 f/11 > > 12 0.60 0.41 0.30 > 14 0.85 0.59 0.40 > 16 1.32 0.94 0.60 > 18 2.20 1.52 1.00 > 20 3.25 2.35 1.60 > > > Jim Nichols > Tullahoma, TN USA > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information