Sigma 70-200mm f/2.8 APO EX DG HSM OS FLD Zoom Lens for Pentax DSLR Camera
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Designed for use with full frame digital SLR cameras. May also be used with smaller APS-c size sensors with a corresponding effective increase in focal length to about 100 to 300mm with most cameras Offering Sigmas OS System (Optical Stabilization).
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