Mount: Canon, Nikon, Pentax, Sigma, Sony A Format: Full frame Construction: 22 elements in 17 groups, nine diaphragm blades Closest focus distance: 140cm Filter size: 77mm Autofocus: ultrasonic (ring) Dimensions: 86 x 198mm, 1,430g Tested on: Nikon D7100 Compared with the equivalent Canon and Nikon...

Even though there's a slight drop in sharpness at 200mm, the Sigma delivers excellent overall image quality, making it exceptional value at the price.

Value for money; Overall performance; Dual-mode image stabilizer

Slight loss of sharpness at full zoom; f/2.8 maximum aperture makes it big and heavy

Produces great colours and the focus is pretty fast, however can be a little inaccurate or miss read the subject. at 2.8f the background blur is beautiful! I would definitely recommend this as a economical option to the Nikon version with cost double.

This is my main glass for sports, since it was my first purchase for shooting HS Sports. I have used it with the Rebel and 40D. This lens is simply great for the price and is great for almost all sports. For the beginner, intermediate or casual shooter, you can not get a better lens for the price.

All you could want from a 70-200 2.8 - period; Sturdy and strong; Just solid; Price

Focus can zoom in and way out when you are in autofocus; Just boom -out of no where; Compared to the Canon 2.8 equivalent (which I borrowed) It is a slight bit off; You will have to work hard to get sharper images

Versatile, sturdy, and built with high-quality optics, the Sigma APO 70-200mm F2.8 EX DG OS HSM offers a good value, although it's not exactly cheap.

It lacks weather sealing; and the autofocus falls a step short

The Sigma APO 70-200mm F2.8 EX DG OS HSM ($1,259) is a less-expensive professional alternative to similar lenses from Canon, Nikon, and Sony. The stabilized 70-200mm f/2.8 zoom is the go-to lens for many an event shooter, and getting one for under $2,000 is an appealing prospect.

Excellent center sharpness through most of its range; Fixed f/2.8 aperture; Includes tripod collar; Optically stabilized

So-so images at 200mm f/2.8; Distortion at 70mm; Edge performance could be better

I purchased this lens after a recomentdation. After using it for a day to get familiar with it, I found that it was just too slow for an f2.8 for the money. The focus seemed to be just a little bit off when wide open at 200mm.

Nice Bokeh; Strong Construction

Slow Focus

My second favorite lens for concert photography. I use the Sigma Art 50-100 mm lens 1.8 for very dark close venues and this lens works great if I am not able to get so close to the stage. With f2.8 it does well in the dark, changing light environment. Quick and sharp focus

Sigma have a long history of producing decent lenses in this range. In this review, Gary Wolstenholme takes a look at their latest optically stabilised version.

Excellent centre sharpness at most focal lengths and apertures; Very low CA levels; Fast AF; Optical Stabiliser; Decent build quality

Lacklustre resolution performance at 70mm and f/2.8

A lens with a 70-200mm focal length range, a wide, fixed max f/2.8 aperture and optical stabilization is destined to become a critical part of most people's lens kit. With this lens model now offered by many manufacturers, "Which one is right for you?