---- Matthew Hunt <[email protected]> wrote: 
> On Wed, Apr 7, 2010 at 9:48 AM, mike wilson <[email protected]> wrote:
> 
> > QSF is indeed the system for manually touching up focus when in AF
> > RTF (I can never remember the exact meaning) is the pentaprism pop-up flash.
> 
> Ah, the Roof-Top Flash.

Yes, that's what comes into my mind when I think of it.  I believe it is 
actually "retractable something flash".

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