I have been using the p20 and o45 on my EM5 for general photography and events. I have been having problems with AF speed and missing too many shots with the p20. Overall very happy with 045, except that the focal length leaves me a bit cramped indoors. I decided to use my boy's 14-42 kit lens for an outdoor daytime event but was unhappy with the results. With more recent experiences I plan to stay prime with a second body and forego the p12-35 v o12-40. Time to pick up a shorter lens since I shoot quite a bit indoors. Will probably pickup a 17mm to replace the p20 due to frustration with missed shots.