Yes, the 360. (540, probably).
I'm aware of the P-TTL program, just wondered about its application in
this mode.
Didn't try it in Auto or Manual.

Thanks once more, Godfrey,

Jack
--- Godfrey DiGiorgi <[EMAIL PROTECTED]> wrote:

> I presume you have one of the dedicated Pentax flash units, the  
> AF540FGZ or AF360FGZ ... ?
> 
> The camera fires a pre-flash prior to the mirror lifting to measure  
> and integrate flash intensity with ambient light intensity. This is  
> how the Pentax P-TTL flash metering system works.
> 
> Godfrey
> 
> 
> On Mar 10, 2007, at 4:03 PM, Jack Davis wrote:
> 
> > Nother subject..kinda. With both the on board and off camera flash,
> I
> > get a flash immediately upon setting off the shutter and another
> just
> > prior to the shutter closing.
> > In both cases, is the first flash ONLY an exposure 'communicator'
> for
> > exclusive use by the trailing curtain flash?
> 
> 
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