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Amazon.com : Bower 500mm Telephoto Lens for Pentax K2000 K1000 K200D K-500 K100D K-50 K-30 K-20D, K-7, K-5, K-5 II, K-5 IIs, K-3 II, K-3, K-S2, K-01, K-S1, K-r, K-x, K-m :
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Amazon.com : 650-1300mm Telephoto Zoom Lens f/8 Manual Telephoto Lens for PENTAX K2000 K10D K10D K100 K100D 645D Q K-5 K-7 K-R K20D K200D Cameras - Black : Electronics
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Amazon.com : 52mm Essential Lens Kit for Select Pentax Digital Cameras. Bundle Includes: 2X Telephoto Lens, 0.45x HD Wide Angle Lens with Macro, Flower Tulip Lens Hood, and UltraPro Accessory Set :
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