I have been using this lens quite a bit now and find it ti be flawless. Very well made and sturdy but a bit heavy but I don't mind. I would recommend this lens to any amateur photograph.

It has been used mostly for videos. The HSM motor for video is excellent. There is no noise when lens autofocuses. I have several Sigma HSM lenses and all work as well or better than advertised. I've used them on commercial video shoots and they have been excellent.

Consistent Output; Durable; Easily Interchangeable; Lightweight; Nice Bokeh

Heavy

As meantioned in the description Wonderful all round lens with excellent low light imaging.

I've seen the review here which mentions Chromatic Aberration / Purple Fringing being not too well-controlled, but try as I might, I am unable to make this lens produce significant visible evidence of CA . I'm testing it on an EOS 80D, shooting RAW, Adobe Color Space.

Convenient focal-length range for a go-to carry-everywhere lens; Excellent sharpness throughout, Well-controlled CA, Silky feel to the zoom ring, No front-element rotation during A/F, Looks great, Light and compact, but not too light

No manual-focus over-ride; Focus ring rotates during A/F

I purchased this lens to replace my standard kit lens that was originally included when I purchased my camera. I can say that after testing the new lens that I am well impressed by the build quality and the resolution of the pictures that are sharp in colour and clarity.

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.

No promises, but I would like to complete a full Sigma 17-70mm f/2.8-4 DC Macro OS C Lens review in the future. For now, please review the standard test results available for this lens and view the eye candy below.

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.

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.

An upgrade of Sigma's digital-only macro lens (the 17–70mm f/2.8–4.5), this large-aperture standard zoom ($450, street) adds a tad more speed, another aspheric element (for a total of three), on-board image stabilization, and several ounces more in weight.