Bi-Directional Body Plate for the Nikon F-6 This is our most fully sculptured camera body plate. Has an interior weight reduction pocket. ARCA compatible and Bi-Directional to allow mounting the camera aligned with the optical axis or perpendicular to it. You will not need to reposition the head to change from a collared lens to an un-collared lens. It mimics the contours of the camera and prevents rotation by matching the camera?s footprint. Mounts with the standard ?-20? screw in the camera. Wrench provided. Weight: 1.2 ozs.