Sigma Imaging (UK) Ltd

	Ephotozine - April 2006 ‘Chromatic aberrations are kept well below the single pixel level throughout the aperture range and across the frame, a commendable performance. Combined with good contrast and the digital coating that Sigma now use to reduce incidences of flare and ghosting, neither of which reared their ugly heads, the lens performed well above the standard ‘kit’ lenses in this focal range.’

	British Journal of Photography - 29th March 2006 ' Combine the 17-70mm range with a macro focusing and you have one extremely versatile lens. And this is exactly what Sigma have done with one of its latest releases.' 'Focusing is internal, which prevents the front element from rotating – a handy feature when using a polarising filter of filter holder.'

	Amateur Photographer - 29th April 2006 ‘Image contrast is medium-high, which reduces the tendency to highlight burn-out. This is one property where a design specifically for digital cameras may perform better than one for film. Detail had the convincing sparkle which lights up the monitor on initial downloading’ ‘The close focusing provided on this lens will add a good deal to the variety of subjects it can cover. It handles well and easily. In all, a workmanlike lens giving high value for its asking price.’

	What Digital Camera - July 2006 ‘The focus and zoom ring are comfortable and quite secure, with a locking device to prevent the zoom slipping from 17mm when the lens is dangling from a camera strap. When using the lens to copy a set of coins, the zoom remained in place, showing that the stiffness of the zoom array is impervious to gravity, but is not so stiff as to prevent quick zooming in normal use.’ ‘Images were sharp with crisp contrast and good colour. Whether I used the lens as a macro or as a standard, I never had cause to complain about the results.’

	F2 Freelance and Digital - June/July 2006 ‘…build quality is approaching the feel associated with the EX DG lenses, and like every Sigma lens I’ve used, it features a metal mount and fits smoothly on the body.’ ‘ …there is almost nothing on the market to match the range of abilities this lens provides at the price.’

	Photography Monthly - November 2007 ‘The inclusion of an SLD element and the faster aperture of this standard zoom lens are designed to produce better images than the cheaper ‘kit’ lens and the extended focal range makes this 17-70mm optic a decent upgrade lens. It also has a close focus ability and the Nikon mount version has the addition of an HSM motor to allow use on the D40 and D40x models. Build quality is also better than many of the cheaper kit lenses and the ‘feel’ of this example is smooth and workmanlike.’

	Digital Photo - July 2008 ‘It has a robust feel with a good quality finish and the lens mount is metal, while a rigid rubberised finish on both the zoom and focusing rings provide a trouble-free action. For an inexpensive step up in both versatility and quality over your kit lens, the Sigma DC 17-70mm f/2.8-4.5 is worth a look.'