For APS-C shooters, the Sigma 17-50mm F2.8 EX DC OS HSM is a gigantic leap upwards in terms of overall performance compared to the variable aperture standard zoom kit lenses shipped with so many DSLRs.
Sigma Pro Photographer, Dave FitzSimmons shares his secrets to attaining the perfect photograph using Sigma accessories. It’s the small things that count! Accessories can offer new creative possibilities for a photographer, whether an accomplished pro or even a neophyte. They offer an inexpensive way to improve your photography.