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Vivitar 600mm f/8 Series 1 Solid Catadioptric Lens with T-Mount for Nikon F-Mount {35.5 Rear} at KEH Camera
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Amazon.com : Opteka 500mm f/6.3 (with 2X- 1000mm) Telephoto Mirror Lens for Nikon F-Mount D6, D5, D4, D850, D810, D800, D780, D750, D610, D600, D7500, D7200, D5600, D5500, D5300, D3500 and D3400
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Vivitar 600mm f/8 Series 1 Solid Catadioptric Lens for M42 Screw Mount {35.5 Rear} with T-Mount Adapter at KEH Camera
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