The LP-59N from Kirk Enterprises is an Arca-type compatible lens foot designed to replace the stock foot included with the Canon 300mm f/2.8 IS II USM and 400mm f/4 IS II USM lenses.
The 4" foot is constructed of solid aluminum that features a black anodized coating to prevent wear and corrosion. Additionally, it features an integrated strap loop, which is compatible with most neck straps, and two removable safety screws to prevent the foot from accidentally sliding out of a clamp. Weighing just 3.4 oz, the plate will make a versatile addition to your lenses without adding unwanted bulk.