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Amazon.com : 420-800mm f/8-16 Manual Telephoto Lens with T-mount Adapter for Canon EOS Rebel T3i, T4i, T5, T5i, T6, T7, T6i, T6s, T7i, SL1, SL2, EOS 60D, 70D, 77D, 80D, 5D III,
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