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.
The post Why Upgrading to the Sigma 17-50mm F2.8 EX DC OS HSM is a Wise Business Decision appeared first on SIGMA Blog.
