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シグマ/Sigma 50mm - 500mm f/4.5-6.3 DG APO OS HSM Lens for Pentax -USA 738109 SG50500OPX

Construction:16 Groups /22 ElementsAngle of view:46.8° - 5°F stop range:22Closest Focusing Distance:19.7-70.9 in./ 50-180cmMaximum Magnification:1:3.1 (f=200mm)Filter Size:95 with 86mm step down adapterDimensions (Length x Diameter):8.6'' x 4.1'' / 219mm x 104.4mmWeight:19702g / 69.5oz.New Sigma APO 50-500mm F4.5-6.3 DG OS HSM. This is a 10x high zoom ratio ultra telephoto zoom lens incorporating Sigma's original Optical Stabilizer function. This lens covers a wide range of focal lengths from 50mm to 500mm ultra telephoto. The OS (Optical Stabilizer) function offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible. For Sony and Pentax mount the built-in OS function of this lens can be used even if the camera body is equipped with an image sensor shift anti-shake system. As compensation for camera shake is visible in the view finder the photographer can easily check for accurate focus and ensure there is no subject movement. Four SLD (Special Low Dispersion) glass elements provide excellent correction of color aberration. The Super Multi-Layer Coating reduces flare and ghost and ensures high image quality throughout the entire zoom range. This lens has a maximum magnification ratio of 1:3.1 (at the focal length of 200mm) making it ideal for close-up photography. This lens incorporates HSM (Hyper Sonic Motor) ensuring quiet and high speed AF as well as full-time manual focus capability. The addition of the optional 1.4x EX DG or 2x EX DG APO Tele Converters produce a 70-700mm F6.3-8 or a 100-1000mm F9-12.6 MF zoom lens respectively. This lens is equipped with a Petal-type hood to block out extraneous light. The filter size of this lens is 95mm and the lens is supplied with a step down ring enabling digital cameras with an APS-C size image sensor to use an 86mm filter. *It is not possible to use a Polarizing filter with the step down ring. If you attach a Polarizing filter you may not be able to remove it from the lens again. *For Pentax and Sony mounts it is not possible to use the AF and the built-in OS function of this lens when attaching it to film SLR cameras as well as Pentax *ist series and K100D. *Nikon and Pentax mounts do not have an aperture ring. Some functions may not work depending on the camera model.The Sigma 50-500mm is commonly used for Wildlife photos and more.

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