Archived posting to the Leica Users Group, 2001/02/08
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At 6:20 PM -0500 2/8/01, Austin Franklin wrote:
> > It is, moreover, TOTALLY standardized.
>
>Ah, that's why every resource cited gives a completely different DOF given
>the same criteria!
>
>It just isn't standardized. Take two lenses from different manufacturers,
>or even different lenses from the same manufacturer with the same focal
>length...and the DOF scale will be different. Here is an example of two
>35mm format lenses:
>
>Leica 35/1.4 ASPH f16 is infinity to 3"
>Zeiss/Contax 35/1.4 f16 is infinity to 4"
>
>And that is just one example, that took no work to easily find, so don't
>tell me this is totally standardized. If it is, obviously, either Zeiss or
>Leica doesn't pay attention to the supposed standard.
INFINITY TO 3 OR 4 INCHES????
Your circle of confusion is an order of magnitude larger than that of
most people.
BTW, the Leica 35/1.4 ASPH (or Summicron 35 or any other Leica 35) at
f/16 is engraved infinity to 4ft. when set at the hyperfocal distance.
- --
* Henning J. Wulff
/|\ Wulff Photography & Design
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