1Ultra Long Focal Length: With 420800mm ultra long focal length, the telephoto lens is good for shooting distant scenery, wild animals, concerts, bird observation, etc. 2Wide Purpose: A wide range of uses, the lens is T2 mount, can be installed on the telescope, used to observe the moon, etc. 3Equipped with Standard Adapter Rings: Equipped with standard adapter rings, it can be mounted to EF mount SLR cameras for shooting distant objects. 4Diverse Features: Manual adjustment, adopt all metal structure, optical glass and multi layer MC coating design. 5Manufacturing Material: Using high quality aluminum alloy body, delicate and textured. Compact shape and volume design, easy to carry, can be fixed by the tripod ring. 6UV Filters: UV filters can reduce the blue tone caused by ultraviolet light, helping to improve the clarity and color rendition effect. 7Applicable Models: Suitable for EOS 5D4, 5D3, 5D2, 5D, 5Ds, 5DsR, 6D, 6D2, 7D, 7D2, 90D, 80D, 77D, 70D, 60D, 50D, 40D, 30D, 20D, 10D, 200D, 800D, 1500D, 1D, Rebel T8i, T8, T7i, T7s, T7, T6i, T6s, T6, T5, T5, T4i, T3i, T3, T2i, T1i, SL3, SL2 and SL1 etc.