Archived posting to the Leica Users Group, 2002/01/14
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At 1:51 PM -0800 1/14/02, Henry Ting wrote:
>I'm reading a lot of posts regarding speculating the
>M7's flash capability.
>The general speculation is that it is going to retain
>the horizontal cloth shutter and its going to be TTL
>reading OTF. However, the point of all this is that
>all films are different. The reflective reading from
>different film can be as much as 2 stop difference.
>This is especially the case between reversal slide and
>color film.
>For example, Hasselblad's TTL even noted in their
>dedicated Proflash listing the actual film speed
>setting for different films, which is different from
>the film-speed setting for their prism meter.
This was discussed to death when the OM OTF measurement first came
out. In practice, most films are withing 1/3 stop. This has been the
basis for OTF flash measurement by all manufacturers, including
Leica, for years. It's a non-issue.
- --
* Henning J. Wulff
/|\ Wulff Photography & Design
/###\ mailto:henningw@archiphoto.com
|[ ]| http://www.archiphoto.com
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