The Jobu Design Lens Replacement Foot for Nikon 600mm f/4 and 400mm f/2.8 lenses takes the place of the factory foot on your
lens. The Jobu replacement foot enables you to
handle your lens better on gimbal heads by lowering the center of gravity, and saves you both weight and space for travel. As this foot is Arca-Swiss style, no additional
quick-release plates are needed.