Former professional photographer looking for a "walking around lens". Something to keep on my Canon 7D (or any crop sensor camera) for most shooting situations. The expanded focal length at the wide end (17mm vs 24mm) is perfect for crop sensor cameras.

Wide focal length

When you consider its price, it's hard to argue with the value that the excellent Sigma 17-70mm F2.8-4 DC Macro OS HSM ($499) delivers. Its aperture is wider than the run-of-the-mill 18-55mm f/3.5-5.6 zoom lens that ships with most entry-level D-SLRs, and it covers both a wider and longer field of...

Sharp; 4.1x zoom range; 1:2.9 macro magnification; Optical stabilization; Wide aperture; Compact and light; Available for multiple camera systems; Compatibility with Sigma USB dock and mount conversion service

Some distortion; Edge softness at 70mm

thanks to snapdeal delivered a day before the committed date package was good but invoice was missing in the package got few cool pics with this lens i am sure i wont mount the kit lens unless i need some crazy stuff sharpness is good all over the image but a big problem with chromatic aberration...

This excellent lens has been used for portrait work and landscapes. I love the quick focus and feel of quality that it just oozes and I cannot find any fault in it. I would buy again and would certainly recommend it.

Durable; Great Features; Great Picture Quality; Lightweight; Simple Controls

Very good value / price ratio if you want to avoid weak zooms sold with high value bodies.

Useful range; Lightweight; Aberrations are not bothersome; Very sharp on the centre; Ideal for travelling

A bit soft on the edge at wide angle; So It is needed to close the diaph at at least 5.6 or raise the focal a little bit

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.

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

Fits the bill as the perfect walk around lens for my 77D. Image quality is very good with nice color rendition and weighs half as much as the 24-105 f/4L. If you shoot both full frame and crop sensor I say get this lens for your crop sensor camera and leave your 24-105 f/4L on you full frame camera.

Hands down best lens for the money. While it's not Nikkor, it is also not over $1k. When my original lens broke after 4 years of abuse (I live in East Africa) I replaced it with a different Sigma. After not getting the same quality shots I bought this one again.

I bought it used at 211 pounds and for that price the lens is superb. The quality of the image is great and focus perfect & fast on my Nikon D7500. Much sharper than my old Nikon 16-85mm lens.