The Sigma 120-300mm f/2.8 EX DG OS HSM is a cheaper option than Nikon and Canon's astronomically expensive (although superb) pro telephoto lenses. With the new model you get optical stabilisation (OS), and the whole thing adds up to a lens that is far from a lightweight.

Completely redesigned, this zoom lens isn't just an old dog with new tricks

Not the newest, but this Sigma zoom lens still has something to offer at the price

Small but feature-packed, this Sigma zoom lens aims to go large on value for money

Macro lens newcomer with bags of functionality

Zoom Lens Upgrades

A real go-faster wide-angle lens

At the budget end of the market, Sigma and Tamron are the major scrappers and Sigma's 10-20mm lens is the cheaper of the two. Despite its low cost compared with lenses from Nikon and Canon, the Sigma feels robust and has silent HSM autofocus

The first surprise of this lens is that it doesn't feature a whisper-quiet hypersonic Sigma motor. Instead, you get a conventional focus ring by the front element, which doesn't enable manual override in Autofocus mode.