[OM] TTL flash theory, was: An object of beauty

[usher99]

I remember trying this once or twice.  I'll defer to John as his images 
were much more compelling and will also await Dr. Flash's comments.
The advantage of the camera in auto is that it accumulates the 
flash/ambient until proper exposure is met.  I think I set it so there 
was a several second--?5-8 exposure AND have the camera exp 
compensation set to adjust for the tonality of the subject.  Set the 
flash say 3 stops down on auto or the equivalent manual setting and 
paint the desired areas  with the flash until the camera closes the 
shutter.
voilà, (perhaps)   I think I only tried it with print film to provide 
more latitude for errors.
Mike


Certainly... for a single shot done manually at a range within the
angular coverage of the flash.  But the exposure was done with multiple
flashes in flash auto mode... which, even ignoring possible overlapping
flashes, with be attempting to turn the black train into a middle gray 
one.

Chuck Norcutt


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