Canon CY1-2180 Lens Mount

Genuine Canon lens mount for the EF 35 1.8, EF 35 1.4 L USM, EF 50 1.4 USM, EF 85 1.8 USM, EF 100 2.8, EF 70-210 3.5-4.5 Ultrasonic, 70-300 4.5-5.6 DO IS USM, EF 75-300 4-5.6 USM, EF 75-300 4-5.6 IS USM, EF 75-300 4-5.6 II, EF 75-300 4-5.6 II USM, EF 75-300 4-5.6 III USM, EF 75-300 4-5.6 III (DC), EF-S 18-135 3.5-5.6 IS, and the EF-S 18-200 3.5-5.6 IS lenses. Made by Canon Japan. See the detail chart below for the proper place to measure the mount on your lens. Then select from the sizes available.