Sigma 70-200mm F2.8 EX DG OS HSM is an Auto Focus (AF)
Telephoto Zoom lens with 35mm FF max sensor coverage and it is designed to be used with Pentax KAF3 mount cameras.
Lenses in Pentax KAF3 Mount with Same Focal and Aperture Range
Lens Mount
Sigma 70-200mm F2.8 EX DG OS HSM is compatible with cameras that have
Pentax KAF3 lens mount. Some of the latest released cameras with Pentax KAF3 lens mount are
Pentax K-3 III,
Pentax K-1 II and
Pentax KP.
Sensor Coverage
Max sensor coverage of Sigma 70-200mm F2.8 EX DG OS HSM is
35mm FF.
Focal Range
Sigma 70-200mm F2.8 EX DG OS HSM has a focal range of 70-200mm and 2.9X zoom ratio. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 105 - 300mm.
Optical Image Stabilization
Sigma 70-200mm F2.8 EX DG OS HSM features an optical image stabilization system which helps to reduce the blur that occurs due to shaking during hand-held shooting.
Body Colour
Sigma 70-200mm F2.8 EX DG OS HSM is available in Black color.
Zoom Method
Sigma 70-200mm F2.8 EX DG OS HSM features
Rotary (internal) zoom method where the length of the lens doesn't change while you are zooming in or out. Even though this design has a size disadvantage in general compare to extending designs, it has the benefits of better sealing against dust and moisture, no zoom creep and no weight balance shift while zooming.
Maximum Magnification Ratio
Sigma 70-200mm F2.8 EX DG OS HSM has a Max Magnification Ratio of
0.13x and has a minimum focusing distance of
1.4m.
Aperture
Sigma 70-200mm F2.8 EX DG OS HSM is a fixed aperture lens with a constant max aperture of f2.8 from 70mm all the way to the 200mm .
Optical Formula
Sigma 70-200mm F2.8 EX DG OS HSM's optical formula consists of 22 elements in 17 groups.
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