• 1. The ring tripod is adjusted to fit the shape and structure of the Canon RF 70-200 F/4L IS USM lens and retains the switch function, and the tripod ring fits snugly on the lens. Lens support collar cannot be used with other lenses • 2. Sticker cannot be applied to the mounting position. If not, the tripod ring cannot be installed, please remove it if necessary. Once installed, the camera can only be shoot horizontally and cannot be taken vertically or rotated • 3. The tripod ring adopts irregular shape,edges and corners are polished. The net weight of the tripod mount ring is about 170g, the inner diameter is about 79mm, the width is about 22.5mm, the inner wall has a 3M plastic protective film. Locking knob with non-slip design • 4. The bottom of the lens bracket collar has a 50mm long Arca Fit quick release plate that can be used directly with the 39mm Arca Swiss Fit tripod ball head, panoramic head and clamp. More practical than lens support collars with no anticut • 5.On the bottom of the lens support collar there is 1/4" and 3/8" screw holes and stainless steel non-slip screws to secure the lens directly to the tripod. The tripod mount ring IS-RF7204 can be combined with the clamp-mount converter IS-3950MFT (sold separately) for use with manfrotto water heads