Probably the best 28mm F/2.0 lens in existance right now (2015)! This is a stunning lens, with NO chromatic abberation, excellent bokeh, and its super sharp right from F/2.0. In fact stopping it down only adds to the depth of field, it does not get any sharper from F/2.0 onwards! A feat of engineering thats for sure. Anyway, a picture is worth a thousand words, so have a look.