As long as you’re using an APS-C sensor camera, it doesn’t matter which system you use, the Sigma 50-150mm f/2.8 EX DG APO OS HSM lens performs equally well on Canon and Nikon cameras. Considering the price, it offers high performance and good value for money and is an ideal solution to achieving the 70-200mm focal range rather than using a nominal 70-200mm lens that, that when used with APS-C cameras becomes more like a 105-300mm lens. In addition, the optical stabilizer and Sigma’s fast – and quiet – HSM focusing keeps the handling and performance levels high. And the addition of internal focusing helps with balance in the hand when shooting. The close focusing, down to 80cm, is also welcome for anyone who likes shooting close-up images.