Mamiya introduces the Mamiya/ Phase One V-Grip Air for 645DF camera, the first vertical grip with built-in wireless flash trigger. It is also the first & only wireless flash sync solution for a medium format camera system that is capable of delivering sync speeds as fast as 1/1600s. The V-Grip Air offers all the same camera controls & functionality as on the 645DF camera. It uses the same type of battery used in Phase One & Leaf digital backs with a backup option to use standard AA type batteries.