> Date: Sun, 8 May 2005 18:48:46 -0600 > From: Peter Norby <[EMAIL PROTECTED]> > Subject: Re: Disabling E-TTL pre-flash on EOS 20D? > > As Deisz, Stefan once said, > > You cannot disable the pre-flash of the built-in flash. You can > > disable it on a 550EX by setting the 550EX to TTL. With any of the > > older EZ-series flashes the 20D will do manual flash only, so you > > could simply buy a cheap second hand flash like a 300EZ. > > Can you explain how this would be achieved? I got a 300EZ > from eBay and stuck it on the 20D. I'm guessing that "A-TTL" > is enough different from "E-TTL" that it can't do anything > automatic (though it does seem to fire the IR light for focus > assist, and zoom the head in sync)? > > I cannot currently get the 300EZ to fire in anything other > than test mode. > It seems like the flash is so simple that there shouldn't > *be* that much I should need (or could, really) to do to make > it work. I have tried it in P, Av, Tv, and M modes, and the > only time it fires is if I hit the test button on the back. > I want to find out who has actually used a 300EZ with the 20D > or other digital body so that I can find out whether I got a > bum flash, or if they just don't work together, as much of > Canon's stuff seems to be fond of.
I'm afraid I overlooked the fact that the 300EZ doesn't have a switch to force it to manual mode. :-( http://www.eosdoc.com/manuals/?q=EX-M-TTL and http://photonotes.org/articles/eos-flash/index.html#disableettl give a description on how to force an E-TTL flash to TTL. Probably this works for A-TTL as well. Hope this helps. Stefan. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
