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The Sigma Corporation is pleased to announce the new Sigma 17-70mm F2.8-4 DC MACRO OS HSM.
This large aperture standard zoom lens offers an aperture of F2.8 at the 17mm focal length and is ideal
for many situations such as portraits, sports, macro and general photography. 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 anti-shake function. As the 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. The maximum aperture of F2.8 produces an attractive background blur and improves
autofocus speed.This lens has a minimum focusing distance of 22cm(8.7in.) throughout the entire zoom
range and maximum magnification ratio of 1:2.7, making it ideal for close-up photography. It is possible
to focus as close as approximately 4.7cm(0.2in.) from the tip of the lens to the subject making this lens
particularly useful for close-up photography.Three aspherical lenses and one ELD (Extraordinary Low
Dispersion) glass element provide excellent correction for all types of aberrations. High image quality is
assured throughout the entire zoom range. The Super Multi-Layer Coating reduces flare and ghosting
and provides high contrast images. The incorporation of HSM (Hyper Sonic Motor) ensures a quiet and
high speed AF. This lens has a rounded 7 blade diaphragm which creates an attractive blur to the out of
focus areas of the image. The inner focusing system eliminates front lens rotation, making the lens
particularly suitable for using the supplied petal-type lens hood and circular polarizing filters.
