Pocket Wizards have been around for some time now, however they are restricted to line of sight operation to trigger remote flash units.
A new unit has come on the market called Radio Poppers, these use radio waves to trigger the remote flash, and work with Nikon or Canon flash units.
More information can be seen at www.radiopopper.com
BobT
Comments
The Canon and Nikon TTL remote triggers and flash commanders are Infrared and are restricted to line of sight
Can you make changes to text pls
Cheers