Sigma DC C 17-70mm f/2.8-4 Macro OS HSM is a fast autofocus zoom lens with image stabilization and ultra-sonic motor for half-frame SLR system.
Equivalent focal length is 26.35...108.5 mm. The optical scheme comprises 16 elements in 14 groups (3AS+1SLD+2FLD). Thanks to minimum aperture ratio of f/2.8 enables shooting in low lighting conditions without a tripod or a flash. Thanks to the 7-bladed aperture, the subjects located outside the depth of field are shown with very smooth features. Equipped with a silent ultrasonic motor providing fast and quiet autofocusing. The Image Stabilizer gives the equivalent effect of a shutter speed.
This lens has a size of 82 mm. This is a normal size, very convenient in everyday use. This lens weighs 470 grams, given the weight of the camera, it may deliver long wearing problems. The lens is suitable for shooting near objects. Mounting the filter has a common size. 17-70mm provides lot of focal length range. x4.1zoom is very useful for traveling. Lens fit for low light conditions. Sigma DC C 17-70mm f/2.8-4 Macro OS HSM went on sale in 2012.
May be available from: Amazon.com, Amazon.co.uk, eBay.com, eBay.co.uk.
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