B000HCN0RG Opteka 500mm f/8 High Definition Preset Telephoto Lens for Canon EOS 80D, 77D, 70D, 60D, 60Da, 50D, 7D, 6D, 5D, 5DS, 1DS, T7i, T7s, T7, T6s, T6i, T6, T5i, T5, T4i, T3i, SL2 and SL1 Digital SLR Cameras

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HD, super multicoated glass optics with anti-reflection coating for the sharper images
Manual focus, digitally-optimized telephoto zoom lens
Gives you the equivalent of looking through a pair of 10x power binoculars, rotating tripod mounting mount
4 Elements in 4 groups
May be combined with the Opteka 2X Multiplier for 1000mm Zoom (Sold separately – 47st Photo Item Code: B000JSZ41S)