In practical terms, how effective is PEN's system image stabilization compared to 5-Axis IBIS of E-M5? I'm considering E-PM2 as backup simply because it has very similar interface with E-M5 and its attractive pricing. I have not used any of smaller Olympus cameras before and wondering, at what situation can I trust E-PM2 to do the job as-well-as E-M5. In other words, under what situation(s) I simply better off be sticking with E-M5? I always shoot with IS1 auto and I do not shoot long, my lens selection varies from UWA S7.5 / P14 / PL25 / O45, all of which does not have lens OIS. Thanks.