----- Original Message ----- From: "Kotsinadelis, Peter (Peter)" <[EMAIL PROTECTED] > Howard, > > Let me try and make this simple. > If you have a ST-E2 you can use either a 420 or 550 as a slave. > If you have a 420EX you need a 550 as a master since the 420 > can only be a slave. > If you have 2 550s they serve as either but > you sill need something like an off camera cord to move the 550 > away from the lens axis. > I have a ST-E2 and 2 550s for this reason. I can position them > anywhere and use the ST-E2 to trigger them. At the time the 420EXs > were not on the market. If they were I may have opted for 2 420s > to save some $$$. THe exception would be the added power of the > 550 which can help with slower films and also in poorly lit > situtations.
And the ability to use an external high voltage power source like the CP-E or the Quantum Turbo, etc. Which is the main reason I ordered a second 550EX. In addition to having a remote flash, I needed a back-up for event work. In both situations I will be using a CP-E. Darrell D. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
