LensTip tested the new announced Sigma 12-24mm f/4 DG HSM Art lens (Amazon/ B&H/ Adorama/ eBay) and posted a detailed review. This new wide angle zoom features excellent image quality, no problems at chromatic aberration and astigmatism and silent and accurate autofocus. What… Read moreSigma 12-24mm f/4 DG HSM Art Lens Review (LensTip)