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Bower 500mm f/6.3 DX Mirror Manual Focus Lens for Canon EF-Mount, White {95} with T-Mount Adapter at KEH Camera
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Bower High-Power 500mm f/8.0 Telephoto Mirror Lens (SLY5008) + 2x (doubles the zoom to 1000mm) for Panasonic LUMIX DMC-G - Walmart.com
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Bower 500mm f/6.3 DX Mirror Manual Focus Lens for Canon EF-Mount, White {95} with T-Mount Adapter at KEH Camera
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