View Single Post
Old Nov 14, 2011, 11:57 AM   #11
Join Date: Aug 2004
Posts: 8,529

Brian - I can only speak to Canon's implementation - and yes there is still a pre-flash if the camera is set to manual exposure and flash is set to ETTL. If the flash is set to manual then there's no pre-flash. How else is the system supposed to know how much power the flash should be set at? So yes, flash exposure is adjusted when using manual exposure - at least with Canon. The flashes are very quick but they're there. Again, remember we're talking camera in manual not the flash.

Now, it may very well be that Pentax uses a different approach that has no ability to adjust flash output when camera is set to manual. That would be unfortunate. It's relevant if the OP is using Pentax.
JohnG is offline   Reply With Quote