Archived posting to the Leica Users Group, 2009/08/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]
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