The LMR-C137 Tripod Mount Ring from Haoge is designed for Canon EF 300mm f/4L IS USM, EF 35-350mm f/3.5-5.6L USM, EF 70-200mm f/2.8L USM, EF 70-200mm f/2.8L IS USM, EF 70-200mm f/2.8L IS II USM, EF 70-200mm f/2.8L IS III USM and EF 100-400mm f/4.5-5.6L IS USM Lens. It features Arca-compatible dovetail which allow you attach your lens to Ball Head, Clamp or Panorama Head of Arca-Swiss standard. Reserved 1/4" and 3/8" screw holes at the bottom for attach lens to tripod directly. Built-in strap hole for carry.

Quick Release System
Designed with Arca-compatible dovetail, photographer could set up camera and lens quickly.

Improves Lens Balance
The ring secures your lens to the camera's tripod.

Thumbscrews Tighten And Loosen Ring
Having thumbscrews control the ring make it easy to adjust the tripod ring on the go.

Gives Your Camera Setup Better Balance
The ring adds stability to your camera and lens. Due to its weight, when the lens is mounted with a camera on a tripod, the center of gravity is shifted to the lens. The ring attaches to the tripod and can be shifted to adjust the balance.

Compatible with:
Canon EF 300mm f/4L IS USM
Canon EF 35-350mm f/3.5-5.6L USM
Canon EF 70-200mm f/2.8L USM
Canon EF 70-200mm f/2.8L IS USM
Canon EF 70-200mm f/2.8L IS II USM
Canon EF 70-200mm f/2.8L IS III USM
Canon EF 100-400mm f/4.5-5.6L IS USM
( Note: it can't be used for other lenses )

Package Included:
1 x Haoge LMR-C137 Tripod Mount Ring for Canon Lens