The combination of the nissin commander air 1 and the receiver air r will give sony owners with a new dimension of flexibility allowing them to wirelesslycontrol almost any kind of nissin camera flash andoriginal manufacturer's flash with nas and ttl hss support. Camera users who currently own a sony original flash will be able to make their existing flashes compatible with the nissin air system, utilising full ttl. High speed sync up to 1 8000 seconds, zoom and manual power output can all be controlled wirelessly.what's more, one commander transmitter can control up to 21 separate air r receivers, which can be programmed into three groups to give the camera user an almost unlimited range of lighting options without having to spend precious time readjusting flashguns between shots.