kb244 wrote:
Well if you have a digital rebel and you dont need to do second curtain flash, the 420EX.
if you need to do second curtain flash and control other flashes in the future 550EX
if you plan on upgrading your body to say a 20D or somehting newer down the road 580EX( E-TTL2 , the rebel is E-TTL)
The 550EX or 580EX, and the Sigma 500 DG Super, support Flash Exposure Compensation, which the DR, OOB, doesn't. They also allow Manual operation with variable power levels (your 540EZ may also support variable power levels, and will only operate in manual mode on the DR) which you won't get from the 420EX on any EOS digital. For almost the price of the 420EX, I'd seriously think about the Sigma. If staying with Canon's important, pick up one of the last remaining 550EXes unless you don't want FEC, manual capabilities, and variable power in manual on this flash. Of course, if you can get a good deal on the 580EX, go for it (Dell had one back in December; $360 before rebate. Anyone know if it's still on?).