Archived posting to the Leica Users Group, 2005/03/24

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Subject: [Leica] Ground resolution, or details available from Hasselblad medium format vs. Leica 35mm
From: krieger at usc.edu (Martin Krieger)
Date: Thu Mar 24 13:11:11 2005
References: <200503241918.j2OJECDT036141@server1.waverley.reid.org>
 
If I understand things correctly, the larger focal length of the 
Hasselblad's Biogon (38mm) gives twice the ground resolution or detail that 
the 19mm Elmarit will give if they have the same quality of film, and if 
both lenses had similar MTFs.

feature-resolution/distance = on-film-resolution/focal-length. That is, if 
we change the focal length from the Elmarit-R to SWC/M Biogon, we'll get 
twice the feature-resolution  if both lenses have fairly similar MTF's, 
using 35mm film for the Elmarit and 120 for the SWC/M. The distance is the 
same to get the same objects on the film..

Am I making good sense here?

MK