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Opteka 650-1300mm (with 2x- 1300-2600mm) Telephoto Zoom Lens for Pentax K-70, K-50, K-3 II, KP, K-1, K-S2, K-S1, K-500, K-30, K5 IIs, K-7, K-5, K-2, K20D, K100D, K110D and K10D Digital SLR
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Lightdow 650-1300mm F8.0-16 Super Telephoto Manual Zoom Lens + T2 Adapter for Pentax K20D K10D K200D K100D K-5 K-7 K-20D Work with Any Pentax/Ricoh DSLR/SLR K-X Adapter (for Pentax Mount, Black) :
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500mm F/8 Super Telephoto Manual Lens for Pentax PK K K3 K5 K7 K20D K200D Camera 713095310342 | eBay
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