The Sigma 70-200 mm f/ 2.8 EX APO DG HSM is a second version of an all-purpose fast zoom released by Sigma in 2005.
The main difference from later versions is a longer minimum distance of shooting of 180 cm.
It is relatively compact (as compared to analogous lenses made by other manufacturers).
A hyper sonic motor (HSM) enables fast and precise focusing. Manual adjustment of sharpness is available.
It does not have a stabilizer.
Due to a 9-blade aperture, the lens produces beautiful blurring of out-of-focus areas (bokeh).
The front lens does not rotate on focusing and zooming, which enables the use of polarized and gradient filters.
A petal hood, a quick-detachable tripod ring mount and a soft case are included with the lens.
The 1.4x EX DG APO and the 2x EX DG APO teleconverters can be used in the autofocus mode to increase the range of focal lengths up to 98-280 mm (lens speed f4) or140-400 mm ( lens speed f/5.6).
When used on APS-C (crop 1.6) cameras, an equivalent focal length is 112- 320 mm.
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Posted by: Flicker Date of publication: 16.11.2011