IanClark wrote in post #16147480
The 7D has wireless flash activation but it pops up the on board flash.. not a good thing.
why not? if your flash has slave capability (ttl or optical), put it on the bracket and use the popup flash to activate it...
when using the pop-up as a master, it will ALWAYS fire. But, it is firing only to communicate with the slave. It is not firing when the image is being taken, but you can't tell. When you set the 7D to wireless flash, this turns off the pop-up as a flash unit, and uses it only as a Master. So you need to choose the Flash Control item at the bottom of the first menu item. Then under Wireless Function, if you do not want it to flash, you select the single flash icon under the Flash Control menu. When you want it to fire along with your external flash, select the two icons
if using as optical slave just set flash exposure compensation to -MAX EV possible