This foot replaces the Canon lens collar foot on the following Canon lenses. You can mount your lens in any Really Right Stuff clamp when this replacement foot is installed.
• 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 Really Right Stuff foot to the lens collar.
3. If your mounting screws loosen over time, consider using a drop of LocTite 242 for better security.

Use one of our Long Lens Packages to stabilize your telephoto lenses and improve your shots. And don't believe just us; read this article by Thom Hogan.

Why Choose a Replacement Foot 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.

Image of LCF-51 mounted on the Canon 600mm/f4L-IS lens © Freddy Franzella. Displayed here with permission.

Specs:

1. Length: 5.8 inches / 147 mm
2. Height: 2.0 inches / 51 mm
3. Weight: 7.0 ounces / 198g
4. Bottom of foot incorporates one ¼"-20 accessory socket.
5. This item includes one LCF-51 replacement foot, one M2.5 hex key, and two M3 safety stop screws.

Flash Bracket:

Our B-Series Flash Brackets mount to the Really Right Stuff lens plate (or replacement foot) on your collared lens. The Canon EF 400mm/f2.8L-IS, EF 600mm/f4L-IS, & EF 800mm/f5.6L lenses are compatible with our largest B91-QR.