> "F. Craig Callahan" <[EMAIL PROTECTED]> wrote:
> That link didn't work for me in the form that it appeared in your
> message. Perhaps I'm being dense but I don't see how messing with
> the ISO setting could affect only the flash output, in the absence
> of any controls on the flash itself. . . .
Hi Craig,
ISO indexing should produce the same effect as if you put different
speed film in your camera. Otherwise, flash exposures would be
incorrect except for one type of film!
For instance, flash pictures should be two stops brighter for ASA
100 film than for ASA 400 film.
So, assume that you have ASA 100 film loaded. First meter your
scene, then lock your exposure in manual mode. Then you fool your
camera into thinking that it has ASA 400 (by adjusting the ISO
setting), your flash pictures taken on ASA 100 will have -2 stops
flash exposure compensation.
After the shot, you have to reset the ISO setting to 100.
Clumsy, but the only way to get FEC on a REBEL with an automatic
flash unit.
Cheers
Julian Loke
*
****
*******
***********************************************************
* For list instructions, including unsubscribe, see:
* http://www.a1.nl/phomepag/markerink/eos_list.htm
***********************************************************
