My preliminary usage has been to photograph flowers and insects after a couple of test shots. Sharpness compares favorably with my Canon EF 100mm f/2.8L Macro IS USM Lens. I would not have purchased such a lens from Sigma without the glowing reviews here.

There aren't many third-party manufacturer products which truly stand out from the crowd. However, Sigma's 150mm f/2.8 EX DG HSM APO macro lens was clearly one of them. Sigma has just released its successor featuring Sigma's OS (Optical Image Stabilizer).