This is very sharp with great colors and contrast lens. Super bokeh. Little bit noisy and not fast but image quality simply superb starting from F2.8.

Daniel Lezano tests and rates the Sigma 17-70mm f/2.8/4 DC Macro OS HSM lens The majority of digital SLRs sold in the UK are supplied in kit form with an 18-55mm zoom, which while representing a good starter lens, isn't the sharpest of optics.

Since I was very pleased with the Sigma 30mm 1.4 EX and 180mm macro EX, I bought this lens second hand to see if it could replace my good old but dying EF 24-85 3.5-4.5 USM (own Canon 10-22, 70-200L f:4, 100-400L, 400L 5.6, 60 2.8 macro, 18-55 IS kitlens, use also 17-40L and 50 1.4).

fast and correct AF; good image stabilisation; sharp on wide angle at f:2.8; short focus distance

not sharp at f:4 on the long side; big and heavy; yellowish color tone compared to Canons

Handling and features This 4.1x zoom lens for APS-C format cameras sports a variable f/2.8-4 maximum aperture, silent focusing, optical stabilisation and a closest focusing distance of 22cm throughout the zoom range.

Clear and accurate website Competitive prices Great comunications throughot keeping me informed of the progress o my order at all times

5/5

bargain lens; amazing images; quiet in AF mode

works best in natural light; extra equipment needed; MF is 'noisy.

[...] I HAVE TRIED THIS LENS ON MY NIKON D300S AND WAS DISAPPOINTED WITH THE PICTURE QUALITY NOT TO MENTION THE COST OF THIS LENS.

Durable; Well Made

Poor picture quality

The 17-70mm focal range is also close to what's possible before a swag of optical performance compromises come into play in order to enable a longer zooming ratio. Consequently, the Sigma is a strong performer across its entire focal range with excellent uniformity of sharpness and brightness.

The Sigma 17-70mm F2.8 -4 DC Macro OS HSM is the practical zoom. A large-aperture, standard zoom lens for digital cameras with an open-aperture value of F2.8 (at 17mm) and covers the most frequently used focal lengths.

This lens exceeds my expectations (based on reviews that I read online) on all aspect, it is both fast and sharp. the provided lens hood is also a bonus. quite heavy though but that should be fine because you'll be getting higher quality photos compared to any standard kit lenses (I was using...