solara wrote in post #10641843
The 7D's built-in flash does not support HSS or 2nd-curtain. So the STE2 would serve a purpose (I don't have one)
You can have HSS/2nd-curtain if you attach a 580EX-II to the 7D, and use that to be the master wireless for other speedlites. For the price of the STE2, I would rather spend a little more and get the 580EX-II (this is for others who don't have the STE2 already), and have an extra flash as well.
I'd love to get rid of my 430s and get some 580s, but unfortunately, that's a little further down my wish list. Fortunately, I got my ST-E2 for around $150 last year. It has been a handy little bugger with the T1i, and I used it once with the 7D before I took the time to learn how the onboard triggering works. I think I'll keep it around a while and do some more experiments with it. I never thought about putting it on a cable to get more flexibility out of it. That's a fantastic idea! It'd be great if someone (FlashZebra, perhaps?) could make a swivel adapter for the hotshoe. I was shooting the other day and wanted to have my speedlite behind me at about 45 degrees to my right, and I couldn't trigger it with the ST-E2. It would have been good if I could have just rotated it to face the speedlite. Oh well. One of these days, I'll get some PWs or something, but I'd like to get much better at OCF before I make that kind of investment.
Thanks to all that answered. You've been quite helpful.