Free Express Shipping! Simmod SIMple Fit Follow Focus Gear (MD, 20mm) Durable Aluminum Focus Gear, Fits 66-69mm Lens Barrel Diameters, 87mm Outer Diameter, 20mm Width, 0.8 MOD, 32-Pitch Gear, Includes Shim Tape, Compressible Inserts, Includes 2...