Best walk around lens for Canon T3i or 600D
Canon EF-S 17-55mm f/2.8 IS USM was regarded as the best walk around lens for Canon APS-C digital SLRs such as Canon 60D and T3i. Canon EF-S 17-55mm f/2.8 IS USM features a large and constant aperture f/2.8 throughout the range. The large aperture allows to take photos with bokeh-the blurred background. The three stop image stabilization allows to take sharp pictures at low light.