High-Power 420-800mm f/8.3 HD Manual Telephoto Zoom Lens for Canon Digital SLR Cameras Works with these Canon T1i, T2i, T3, T3i, T4i, T5, T5i, T6i, T6s, SL1, EOS60D, EOS70D, 50D, 40D, 30D, EOS 5D, EOS1D, EOS5D III, EOS 5Ds, EOS 6D, EOS 7D, EOS 7D Mark II Digital Cameras High-power 420MM-800MM telephoto focal length Includes T-mount adapter for digital and 35mm Canon EOS SLR cameras High index, low-dispersion multi-coated optical glass to reduce flare 4 Elements in 2 groups