Peter Norby wrote: (edited) Does anybody know if there's a way to disable the E-TTL pre-flash on an EOS 20D? After reading an article in Pop Photo about Sunpak's cheap little battery-powered softbox-esque flashes (FP-38s), I got a couple for my birthday and was trying to replicate their setup. Well, I didn't have much success with them and set them aside for later.
Fastforward a year later. I'm actually taking unstructured lessons from somebody who ran the lighting studio for the Santa Fe Workshops and we finally figured out what the problem with my setup was while I was trying to replicate his studio light setup w/ my smaller FP-38s. When using the 20D's on-board flash to optically trigger the FP-38s as slave lights, the pre-flash cause them to trigger prematurely, yielding no flash during the exposure. we verified this by pointing the camera straight at the flash and taking a picture. I was able to clearly see the flash go off in the viewfinder before the shutter opened and obscured it. ------------------------------------------------------------------------ -- Been there, done that. Which flash? On the 550Ex there is a CF that allows you to use A-TTL which does not fire a pre-flash and will trip the lights on the prime (only) flash. Alternatively you can set the flash to manual. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
