Daniel Lezano puts Sigma's fast telezoom through its paces Guide Price: £1,540 / Street Price: £1,000 construction: 22 elements in 17 groups Maximum aperture: f/2.8 Minimum aperture: f/22 Filter thread: 77mm Angle of view: 34.3º – 12.3º No.

One of the favorite lenses among news photographers, a 70-200mm f/2.8 or 80-200mm f/2.8 zoom also appeals to many serious photo enthusiasts. Although large and heavy, lenses of this type offer several benefits.

My second Sigma 70-200 F/2.8 and now with OS (Image Stabilized). Sigma made some really important and necessary improvements. I loved the previous version but there were some issues with micro contrast and slight CA. But it was such a tremendous value.

Image Stabilizer; Fast Aperture; Comparable quality to Canon and Nikon equivalents; Quick Release Tripod Ring; Large Zoom Ring

Noisy IS which takes a second or two to activate; heavy; not weather proofed

Overall it's a very good lens and a good investment. It gives fantastic results when used at f/4 and also gives very good and perfectly usable images at f/2.8 It's only a notch off the Nikon and Canon alternatives. I am very pleased with it and have not regretted buying it one bit.

A bit soft at f/2.8

Great Build Quality, Stabilizer works very effectively with low shutter speeds, has a very heavy and solid feel, silent and fast autofocus; It has very smooth zoom and focus rings; It performs great in low light situations and provides high shutter speeds

The new Sigma 70-200mm/f2.8 APO DG HSM with optical stabilizer (OS) is an updated version for the popular fast 70-200mm zoom. For the first time from a third-party lens supplier, a 70-200mm, f/2.8 zoom has optical image stabilization.

In terms of overall performance there's no beating the Canon and Nikon 70-200mm lenses. They do the best job of focusing on fast-moving subjects. However, this Sigma isn't too far behind when it comes to tracking movement.

Sigma's New APO 70-200mm F2.8 EX DG OS HSM is the second generation of this large aperture telephoto zoom lens now incorporating Sigma's Optical Stablization function, OS, our own anti-shake system which makes viewing a stabilized image in the viewfinder possible for Sony and Pentax users if chosen.