Sigma 24-70mm f/2.8 IF EX DG HSM
£850.00
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High quality optics, a constant f/2.8 and HSM make the Sigma 24-70mm f/2.8 IF EX DG HSM a lens to be reckoned with.
Photo answers review
Photo answers rating 
This Sigma 24-70mm f/2.8 is made from top grade glass consisting of ELD (Extraordinary Low Dispersion), two LD (Low Dispersion), and three aspherical lenses. All this glass weighs in at a solid 790g, but the resulting performance is worth it. For what appears to be an expensive £850, you’re getting a high performance lens that reduces distortion, flare and aberration that could ruin a great shot. The extra quality in this 24-70mm EX DG lens is demonstrated by sharper edge definition and cleaner images. You also have the advantage of a constant f/2.8 max. aperture, so the lens is ideal for low light and tight depth-of-field. Focusing is fast and quiet too, thanks to the HSM (Hyper-Sonic Motor) technology.