it's very good, better than many, though on my shortlist of 5 standard walkaround lenses--in order of preference, 28/2, 50/1.2, 35/2-O.C, 50/1.8 longnose, 35/1.4--it has to be no. 5 due to totally uncontrollable flare and ghosting; truly great as a "special effects" lens for artsy environmental portraits for this reason