Archived posting to the Leica Users Group, 1998/02/04

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Subject: [Leica] Macro Question
From: "Frank Filippone" <red735i@worldnet.att.net>
Date: Wed, 4 Feb 1998 19:01:21 -0800

Could someone check their DOF tables... 

If you use 2 different lenses, say a 50MM and a 100 MM .....which gives
more wide depth of field?

The subject area that is in the VF is the same using either lens,  implying
that the camera will move closer to the subject with the 50 than the
100....
The taking aperture is the same.
The only difference is the distance to the subject ( the 50MM is closer
).....  Please quote DOF distances in MM or inches....Please do not get
into the circle of confusion, etc.  Hold all those variables constant...

The purpose in this question is to figure out if a wider angle lens has the
same or wider DOF: if it does, then the closer proximity to the subject (
Half the distance) using the wider lens will alow a 2 stop smaller F-stop
using a flash, therefore increasing DOF even more....a big bonus to tne
macro types....

Thanks for helping.... I am trying to figure out which R series Macro lens
I should explore...


Thank You
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Frank Filippone
red735i@worldnet.att.net