dustyporch wrote in post #8733786
I use my ST-E2 on my XTi and I find it works great. But if I move to a 7D, the popup flash can replicate all the functions of the ST-E2 (plus more).
The only advantage I can think of is that the ST-E2 uses IR, so it doesn't tend to bother the subject (its just a tiny spot of red).
Thoughts? Will there be a rash of ST-E2s for sale as the 7Ds start being delivered?
The ST-E2 has a focus assist lamp that can be used for focusing in the dark (that's what that red light is, it's not the IR used to send out the commands). The 7D, on the other hand, uses the built-in flash fired in a blitz of light pulses for focus assist which can be annoying to some people. So that would be one advantage of using the ST-E2. However, purely for controlling slave flashes, the built-in flash might have more of an advantage over the ST-E2.