I believe the original poster was mistaken about the 300EZ. You can use the 540EZ because it can be switched to manual, but the 300EZ doesn't have a manual mode, so I don't think there's a way to fire it on an EOS digital body, unless you want to tape all but the center pin, in which case it would probably work as a fully manual flash, firing at full power whenver triggered.
Tom P. > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > Peter Norby > Sent: Sunday, May 08, 2005 7:49 PM > To: [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. > > > Regards, Stefan. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
