Not sure of the f.no. thing myself , as I said , I didn't have loads of time and I had it on landscape setting for convenience some of the time . I didnt try the video at all but I shall do so and report back.
I like the camera a lot and have blown a couple up to A3 with very good results. It obviously isn't the quality of my EPL2 but the range is superb , it's quick and the in camera processing to some of the "artistic" filters is fun. I've never had a Samsung before but the lens has impressed me, a good carrrying around camera..