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Forum: Pentax DSLR Discussion
08-26-2009, 06:12 PM
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Well, if you are using the built-in flash as the wireless controller, then yes, it will always flash at least enough to do a PTTL measurement and then to tell the wireless flash when to fire.
But if you don't want it to flash DURING the exposure -- i.e., so only your external wireless flash will illuminate your photo -- there's a setting for that.
Custom menu item 29, set it to OFF ("Discharges the built in flash as a test flash"). Neither the menu nor the manual is very clear about this, but I think this is what you're looking for.
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