Precisely machined from a solid block of 6061-T6 aluminum, the Really Right Stuff LCF-54 Foot will replace the original foot of a Canon EF 100-400mm f/4.5-5.6L IS II USM lens and provides an extremely durable and stable platform for your lens. The foot incorporates an Arca-type compatible dovetail that has an increased height, which will make the grip more comfortable during transport. The bottom of the foot features both 1/4"-20 and 3/8"-16 accessory threads including a QD socket, which is compatible with a QD Strap Swivel, to connect a camera strap. At the same time, an integrated strap lug is available at the front. The foot comes with two safety-stop screws to prevent the foot from accidentally sliding out of some clamps and it is made in the USA.
EF 100-400mm f/4.5-5.6L IS II USM