Some collared, telephoto lenses have a foot than can be removed. If your lens has this option, choose one of our foot replacements instead of a lens plate. A replacement foot with built-in-dovetail mounting will be lighter, lower in profile, and provide the best possible stability for your lens. Really Right Stuff foot replacements are precision machined from solid blocks of 6061-T6 aluminum and are fully compatible with any RRS Dovetail quick-release system. This foot replaces the Canon lens collar foot on the following Canon lenses:
Canon EF 400mm f/2.8L-IS
Canon EF 600mm f/4L-IS
Canon EF 800mm f/5.6L-IS 1. To remove the Canon foot, use the M3 hex key tool that comes with the LCF-51 to completely remove the four Canon mounting screws. 2. To install the LCF-51, use the four original Canon screws and secure the RRS foot to the lens collar. 3. If your mounting screws loosen over time, consider using a drop of medium threadlocker, such as Vibratite or Loctite 242 for better security. Use one of our Long Lens Support Packages to stabilize your telephoto lenses and improve your shots.