Conclusion

The Sigma 150-600mm f/5-6.3 DG OS HSM Sports offers a unique and high-quality alternative to similar lenses from Canon and Nikon. Neither of those companies have a lens in their line-ups with the same focal range though - the nearest competitor is the Tamron SP 150-600mm f/5-6.3 Di VC USD, which is half the weight and half the price, but doesn't offer the same image quality as this Sigma lens.

Build quality is excellent, with the brass lens mount and sober all-black design adding to the high-quality feel and the dust/splash-proof construction adding some peace of mind, plus there's a very good lens hood and padded case. It is a heavy lens that you won't want to hand-hold for too long, though, and therefore best suited to life on a tripod/monopod. Focusing was very quick on the Canon EOS 5D Mark III that we tested the lens with, and manual focus over-ride is a great feature, as is the effective built-in optical image stabilisation system.

The Sigma 150-600mm f/5-6.3 DG OS HSM Sports is tack-sharp at both the centre and edges of the frame when stopped down by one-stop at all the focal lengths, with performance only really dropping off at 600mm. Obvious vignetting at wide-open apertures is the only other real optical issue of note, and this can be easily corrected in post-production.

Even the price of the Sigma 150-600mm f/5-6.3 DG OS HSM Sports is relatively attractive, undercutting the main rival lenses from Canon and Nikon and offering better image quality than the Tamron SP 150-600mm. We can strongly recommend the new Sigma 150-600mm f/5-6.3 DG OS HSM Sports as a versatile telephoto zoom lens that delivers excellent results on the latest full-frame DSLRs.

Ratings (out of 5)
Design	4
Features	5
Ease-of-use	4
Image quality	5
Value for money	4