Dust Cap E Rear Compatible with: EF Lenses, Tele-Extenders and Extension Tubes. Product Compatibility EF 100 2.0 USM EF 100 2.8 MACRO USM EF 100-300 4.5-5.6 USM EF 100-400 4.5-5.6 L IS EF 135 2.0 L USM EF 135 2.8 SOFT FOCUS EF 14 2.8 L USM EF 15 2.8 FISH EYE EF 16-35 2.8L USM EF 17-35 2.8L USM EF 17-40 4 L USM EF 180 3.5L MACRO USM EF 20 2.8 USM EF 200 1.8 L USM EF 200 2.8 L II EF 20-35 3.5-4.5 USM EF 24 1.4 L USM EF 24 2.8 EF 24-85 3.5-4.5 USM EF 28 1.8 USM EF 28 2.8 EF 28-105 4.0-5.6 USM EF 28-135 3.5-5.6 IS EF 28-200 3.5-5.6 USM EF 28-70 2.8L USM EF 28-80 3.5-5.6 II EF 28-90 4.0-5.6 II EF 28-90 4.0-5.6 USM II EF 300 2.8 L IS USM EF 300 4.0 L IS EF 35 1.4 L USM EF 35 2.0 EF 35-350 3.5-5.6 L USM EF 400 2.8 L IS USM EF 400 4.0 DO IS USM EF 400 5.6 L USM EF 50 1.4 USM EF 50 1.8 II EF 50 2.5 M EF 500 4.0 L IS USM EF 600 4.0 L IS USM EF 70-200 2.8 L USM EF 70-200 2.8L IS USM EF 70-200 4.0 L USM EF 75-300 4.0-5.6 III EF 75-300 4.0-5.6 IS USM EF 75-300 III USM EF 80-200 4.5-5.6 II EF 85 1.2 L USM EF 85 1.8 USM TS-E 24 3.5L TS-E 45 2.8 TS-E 90 2.8