A while back, sigma announced that they were revamping their lens lineup for micro 4/3 and Sony NEX cameras.  At the time, they offered 2 of the best budget lenses for either of these mirrorless systems – namely, their 19mm 2.8 and 30mm 2.8 lenses.  Now, the reboot is complete and the new versions of these lenses are hitting the market as part of Sigma’s new “Art” lens collection, and they’ll be joined by a 60mm 2.8 lens as well.  Will these new lenses be a worthy addition to your lens collections and do they warrant an upgrade over the [More]