The Jobu Design Replacement Foot for Canon 600mm f/4 IS II & 400mm f/2.8 IS II Lenses replaces the factory foot of your Canon lens and introduces an Arca Swiss-style profile, for easy attachment to a corresponding quick-release clamp of a gimbal or other head. With the Arca-style profile integrated into the foot, the stack height is reduced and things stay lower in profile.
Made of CNC billet aluminum and hard-anodized in black, the replacement foot installs easily by using the four M4 screws that came with your IS II lens.
The bottom of the foot features two safety stop screws (M3 size) that prevent the lens from sliding out of the quick-release element, in the event that the clamp is inadvertently left loose. This prevents potential damage to your valuable equipment.