Archived posting to the Leica Users Group, 2009/08/03

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Subject: [Leica] Fw: DOF Using the Elmarit-R 60/2.8 in Macro Range
From: stasys1 at cox.net (stasys1 at cox.net)
Date: Mon, 3 Aug 2009 16:19:51 -0700

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



In reply to: Message from jhnichols at lighttube.net (Jim Nichols) ([Leica] Fw: DOF Using the Elmarit-R 60/2.8 in Macro Range)