I really like this glass, its big and beautiful! really smooth hsm motor. Really smooth zoom ring, very solid construction! Lens hood stays intact really good, clicks in nicely! I would recomend this to anyone who has a d7100 or lower in the dx range.

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.

When it comes to DSLR image quality, pretty much all of us have heard the old truism about the quality of the lens being more important than the price of the camera. In this respect it pays to get off to the best possible start when buying your first DSLR, or when taking your first steps towards...

Constant aperture of f/2.8; Smooth zooming action; Delivers excellent results

Manual focus ring is fiddly; All-plastic outer construction; Resolution tails off above f/11

A compact standard zoom lens for APS-C digital SLRs from Sigma with a bright constant f/2.8 aperture, optical stabilisation and a silent focusing motor.

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

As far as build quality is concerned, the Sigma 17-50mm f/2.8 EX DC OS HSM is very sturdy, with a rigid zoom barrel that doesn't need much rotating to go through all the focal lengths.

Picked up one of these used on eBay. It's a crap shoot when you buy a used lens, especially a third party brand, but Sigma has a good reputation, and online reviews of this model are very decent. Price is steep for a third-party lens, but picture quality is very good, especially between 28 and 50mm.