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Used Pentax SMCT-67 800mm f/4 Lens 29434 B&H Photo Video
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Amazon.com : Vbestlife High-Power 420mm/800mm F/8.3-16 Manual Telephoto Zoom Lens for Canon//Minolta/Nikon/Pentax/Olympus and Other DSLR Cameras. : Electronics
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Amazon.com : 420‑800mm F8.3-16 Super Telephoto Lens,Manual Focusing Zoom Lens Telephoto Telescope,Alloy + Optical Glass Lens,for Pentax PK Mount Camera Body : Electronics
