gfen wrote:
> So, is there a generic formula to be used in getting a feel for just how
> far you dial down teh flash in fill?

I've certainly never seen one, except for the "1-2 stops" general
guideline. More of a matter of trying it to see. Bracket your fill flash
if you're really worried about it.
 
> On a camera that lacks the convienent little dial to set this, how do you
> normally change this amount?

It's all about f-stops. :-)
On a non-TTL flash setup, with an auto flash, you either change the
setting on the flash or the aperture setting on the camera, so that the
flash is firing for an aperture that is one or two stops more open than
the lens is actually set for.
More of a PITA to do, but still doable.

-Mat

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