Was looking for a lens like this for a while.When I saw this lens on the internet, I did some research and decided to buy it. It is now my main lens for everything from landscapes to portraits. The only reason I didnt give it 5 stars is because the focusing motor is noisy for videos.

The out door pics were ok but the indoor low light pics were horrible at best every face had orange tint in them & poor low light in back/sides of the subject almost blacked out.I would never recommend this lens to anyone !

Poor in Low Light

Everything that's told about this lens is right and delivered; except two things. 1. OS - no OS as Sigma claims. I've been using this lens for 5 months and I can tell clearly that the lens sucks on this aspect. 2.

i like this product and i can recommend too

its work perfectly

This lens performs like my 50mm 1.8/f prime lens, but with the ability for zoom in and out. This is exactly what I needed and I'm so glad that a friend recommended it to me. It's so clear, has excellent bokeh, and feels very solid. I never leave home without it.

Gary Wolstenholme takes a look at Sigma's flagship standard zoom for APS-C digital SLR cameras. Sigma's 17-50mm f/2.8 EX DC OS HSM costs around ￡590 and is available for Sigma, Canon, Nikon, Sony and Pentax SLR cameras that have an APS-C or smaller sized sensor.

Excellent performance in the centre between 28 and 50mm when stopped down; Effective Optical Stabiliser; Compact and lightweight for an f/2.8 zoom

Lens really needs stopping down for best results; Sharpness towards the edges; Focus ring cannot be disengaged

The Sigma 17-50mm f/2.8 EX DC OS HSM Lens features a nice range of focal lengths, a wide f/2.8 aperture, HSM autofocus and OS (optical stabilization) in a well-built and reasonably-priced lens.

Digital-only speedsters in the 16–55mm range are at home in the Canon, Nikon, Pentax, and Tamron catalogs. All offer fast f/2.8 constant apertures and image stabilization (except for the Pentax, which puts IS in the camera).

You might think this is the lens to get, and you might be right. It gets lots of great praise across the internet, so why not get it It comes in the mail and you love it, works like a charm and produces great pictures.... oh wait, whats that Why is the right side so blurry

Cheap; Has OS that works pretty well; Seems like a good copy would be very sharp; has switches on the body to turn off OS and AF

Lens comes included with terrible QC, good luck getting a copy that isn\'t decentered to some degree AND doesn\'t have a broken AF motor out of the box; It will never focus as well as a Canikon lens; Doesn\'t work well with outer focusing points, making them useless.

I wanted a fast normal zoom to use with my D300. Based on the many reviews online it was easy to narrow my decision down to two choices, the Nikon 17-55 f/2.8 or the Sigma 17-50mm f/2.8. I decided to get the Sigma since it was half the price of the Nikon and had VR.

Lighter, Less Expensive than the Nikon option; Generally very good overall sharpness and excellent in the center.

Corner softness at f/4 or less when wide