It features arca swiss bottom plate for attaching your lens to Ball Head, Clamp or Panorama Head of Arca-Swiss standard.There are also 3/8″-16 and 1/4″-20 holes at the bottom for attaching on tripod,light stand,etc.
This tripod mount ring helps fix and balance your tele lens which is heavy or long lens hanging off the front of camera.
Suitable for Canon RF 100-500mm F4.5-7.1 L is USM Lens.
Made of aluminum alloy.Ring dia is 80mm/3.15in,weighs 163g/0.36lb.