The phot r e1 hand strap adds security to a hand holding camera and has been designed to be used with pro body cameras that have a built in power booster or grip or where an optional battery grip has been added the strap is cushioned and fits around your hand and stabilises your camera while shooting the strap attaches with one end to the eyelet at the top of the camera and the other end to the eyelet in the base of the boostergrip it allows the photographer to control the camera with gre