> > On Sat, 7 Dec 2002 23:43:31 -0000 "mrogers" > <[EMAIL PROTECTED]> writes: > > > > > Its my understanding the Canon speedlites cannot operate under TTL > mode > > > with digital cameras. The digicams lack an off-the-film sensor > necessary > > > for TTL exposure control. > > > > > That is correct but the IR focus assist still works giving much > > enhanced low light focussing without the flash firing. > > > > Regards > > > > Mark > > A simpler method is to set the Master/Slave switch to "Off". > > Dave Herzstein > [EMAIL PROTECTED] > http://www.kjsl.com/~dave >
Dave, I don't think that will work. Definately not hust tried it - the flash still fires with the master/slave switch off. Setting CF3 on on the 550EX enables TTL flash, which as you correctly state will not work with digicams, as a result the high powered red AF assist works but the flash does not fire - at all. In effect by setting the switch you are converting the EX550 to STE2 controller unit. Very good for longer range low available light photography as it disables the dazzling/distracting on camera maglite but enables focus assist with the less obtrusive red light. regards Mark * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
