Introduced by ARRI in the 1970s, the current rod standards ensure that all camera accessories are compatible with every film or digital camera system. This allows rental facilities to offer the latest accessories with their traditional camera range, while also enabling single users to keep their existing accessories after camera upgrades.
ARRI cameras always conform to rod standards. The range of ARRI Pro Camera Accessories renders a wide selection of new third-party digital cameras compatible with accessories such as matte boxes, rain deflectors and ring lights.
Overview of rod standards, PDF