For better stability and shooting effect， we recommend you to try this Tripod Mount Ring for Canon EF 100mm/F2.8. The tripod mount ring helps fix and balance the camera and lens， so that you can easily aim the object without worrying that the lens would crashing down due to its weight. If you own it， you could easily lift the camera instead of hanging a little heavy one around your neck. Adopting anodic treatment on the surface， this tripod mount ring is anti-rust and dustproof.                                    Features            It is designed for Canon EF 100mm/F2.8It helps you fix and balance your heavy lensAdopting anodic treatment on the surface， it is anti-rust and dustproofLock the mount ring and lens by tightening the screw                                                            Specifications            Weight    4.16 oz / 118 g    <br>Material    Aluminum Alloy    <br>Color    Black    <br>Compatible with    Canon EF 100mm / F2.8 USM Macro Lens    <br>Dimensions    (3.86 x 3.07 x 1.77) " / (9.8 x 7.8 x 4.5) cm (L x W x H)    <br>                                                            Package Includes            1 x Tripod Mount Ring for Canon EF 100mm/F2.8<br>                                                            Extra Info            Compatibility: Canon EF 100mm/F2.8 USM Macro Lens<br>