"The range is less however, at about 400 ft"
I read the above and thought...would it be possible to extend the range of wireless triggers using a repeater type technique? Would there be too much delay? I don't know the answers and I can't try it 'cause I don't have the hardware to do it out but I can tell you what I am thinking might work and maybe someone can shoot it full of holes of prove or disprove it.
You'll need two transmitters, each an a different transmit frequency
Also need two receivers and two flashes.
- Setup XMTR #1 on camera.
- Place Flash #1 some distance (close to its MAX range) away from the camera.
- Fire a test shot and verify the setup and range are OK so far.
- Place XMTR #2 alongside RCVR #1.
- Set XMTR #2 on a frequency other than that of XMTR #1.
- Connect XMTR #2 using a hotshoe adapter or what have you so that it is fired by RCVR #1 along with Flash #1.
- Place RCVR #2 and Flash #2 some distance (close to MAX) from XMTR #2.
- Set RCVR #2 on frequency 2.
- Fire off a couple test shots and see what happens.
Actually you wouldn't need a flash at the middle location, you could just chain a receiver to a transmitter.
The contacts on the transmitters and receivers should be dry (produce no voltage of their own, just close a set of contacts), so shouldn't hurt either half of the setup.