Canon
ripod Mount Ring C for 70-300mm f/4-5.6L and 28-300mm f/3.5-5.6L Lenses
The Canon Tripod Mount Ring C for the EF 70-300mm f/4-5.6L IS USM and EF 28-300mm f/3.5-5.6L IS USM lenses makes lens rotation and balance easier, minimising vibrations and movements to keep a sharp image quality.