My idea is mimicking a twin-light macro flash MT-24Ex by using two flashes, 580Ex
and 420Ex on each side of my camera.
I drilled three 1/4" holes on a metal plate and screw it to my camera, with extension
cord to fix 580Ex as master, which can fix onto the metal plate by another screw..
I put a 420Ex in slave mode.. I was told 580Ex and 420Ex must be in line of sight..
Now my question is, with camera in the middle, will the 580Ex trigger successfully?