LF-C1i Canon lens replacement foot. Exquisitely CNC machined, high standard hard anodized finish, Arca-swiss dovetail groove. Compatible with Canon 400mm F2.8 IS/ISII, 600mm F4 IS/ISII and 800mm F5.6 IS etc. lens. The LF-C1i is 10mm thicker than the previous LF-C1, making it suitable for the 600mm F4 ISII lens; the added strap hole as well as 3/8" mounting hole ensure safe and convenient use of the camera. Ergonomic curvy design and anti-skid diamond knurling provides comfortable hand-grip.