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Amazon.com : Super Hi Def 0.43x Fisheye Lens for Pentax K-3 K-3 II (for 18-135mm Lens) (62mm Compatible) : Electronics
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Amazon.com : Opteka .35x HD Super AF Wide Angle Fisheye Lens with Macro and Microfiber Cloth for Pentax K-S2, K-S1, K-1, K-500, K-70, K-50, K-30, K5 IIs, K-7, K-5, K-3, K-2, K20D,
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Pentax HD DA Fisheye 10-17mm F3.5-4.5 ED Lens | Digital SLR Camera, Digital Cameras, Toronto Canada Digital Camera Store, Aden Camera
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