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I'm thinking about getting a speedlight to use for off-camera lighting, perhaps the SB700, but I don't understand its different wireless triggers, this website says:
For off camera use, the SB700 can be controlled (1) via Nikon’s wireless AWL mode using TTL or manual mode, (2)... or (3) with the simple optical “SU-4″ slave mode.
If I it understand correctly, AWL is not radio, right? so is it necessary to fire the built-in flash to control it, what if I don't want the light from the built-in flash, do I have to use an IR Panel or is there any other to turn off its light only?
I'm also concerned about the optical receiver on the speedlight, apparently it is on right side of the SB700′s body, then how can I position the flash in right side of camera? can the optical receiver still receive the command if it's not positioned in line with camera?