>> information or dose it uses some kind of radio relays? (Such relays
>> should be present because of the existence of different channels on
AFAIK, none of the wireless flash system from Pentax, Nikon, Canon or
Minolta (and Metz of course) use radio waves. They all depend on coded
bursts of the RTF (retractable flash) or a controller flash in the
hotshoe. It's a cheaper solution probably. There is a 3rd party radio
waves flash system which supposedly even works with TTL, made by
PocketWizard. How can there be several "channels" - it's just
different coding of the flash bursts. It's probably a digital, binary
communication.
Good light!
fra
