This Sigma 170-500mm f5-6.3 Aspherical RF APO is a high-performance telephoto Zoom lens. 5 lens group zoom system with an aspherical lens element deliver sharp high contrast images throughout the entire zoom range Sigma's unique Apochromatic lens design and three SLD glass elements eliminate the aberrations usually found in ultra-telephoto lenses Convenient built-in Rotary tripod mount eliminates vibration during shutter release Accepts 86mm size filters
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Pictured above: SIGMA LENS 170-500mm f5-6.3 Aspherical RF APO SLR CAMERA LENS
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