Archived posting to the Leica Users Group, 2004/07/03

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Subject: [Leica] best practices - focusing narrow DOF with the rangefinder...
From: rpalmier at depaul.edu (Robert Palmieri)
Date: Sat Jul 3 02:32:25 2004
 
Henning Wulf wrote:

>Since most camera lenses, and especially high speed ones are not flat 
>field lenses, trying to compensate will prove futile. In fact, the 
>usual curvature of the object plane is concave as seen from the 
>camera, so there is some degree of compensation built into many 
>lenses and trying to calculate a compensation distance differential 
>trigonometrically will likely give you an incorrect result, besides 
>allowing your subject time to move to the next room and finish dinner 
>(which will require further compensation of various sorts).

Agreed.  'Specially that last part...

Bob Palmieri