Leica S Multi-Function Hand Grip 
The Multi-Function Handgrip for the S-Camera from leica offers you an
additional way to hold a second S2 Battery,. In addition to a handy vertical
shutter release, the grip is controlled by an easily accessible on/off switch.
For tripod shooters, there are both 1/4 x 20 and 3/8 mounts. In addition, leica
has built-in an anti-twist system to hold the camera steady while working.