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Amazon.com : Canon EF 75-300mm III and 500mm f/8.0 Preset Manual Focus Lens Bundle with EF-EOS M Adapter, for Canon EOS M , M50, M6, M5, M100, M10 Cameras : Electronics
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Opteka 500mm/1000mm f/8 Manual Telephoto Lens for Canon EOS RF-Mount R6, R5, Ra, RP and R Mirrorless Digital Cameras (White) - Walmart.com
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