The nissin receiver air r for canon adds a new dimension of flexibility to the popular nissin air system nas combined with the nissin commander air 1 it allows a photographer to wirelessly control almost any kind of nissin camera flash and many original canon flash with nas and ttl hss support high speed sync up to 18000 seconds zoom and manual power output can all be controlled wirelessly whats more one commander transmitter can control up to 21 separate air r receivers which can b