The L100 Lens Plate for Canon Tripod Mount Ring D (including the EF 100mm f/2.8L Macro IS USM Lens) from Really Right Stuff is designed for this lens foot, which mounts directly to the plate via its 1/4"-20 threaded mount. The Arca-type-compatible plate has a rear anti-twist flange that prevents twisting between the plate and the lens while mounted to the foot. The plate is CNC machined from 6061-T6 aluminum, which has a durable Type II anodized black finish.
Comes with large and small hex key and installation instructions.