The PBSA7R Bracket Plate from ProMediaGear is an Arca-type, custom quick release plate designed specifically for the Sony Alpha a7, a7r, and a7s cameras.
The plate is compatible with ProMediaGear flash brackets, L-Brackets, and other standard Arca-type accessories. Its custom fit is designed to match the body shape of the a7, a7r, and a7s, preventing unwanted twisting or slipping when the camera is mounted to a tripod or other support.
The plate is constructed from aluminum and features a hard black anodized surface coating for a scratch-resistant finish. The plate also features 1/4"-20 threads for mounting other quick release plates or accessories.