I have the Olympus E-M1 and two lenses that I am considering: the m40-150 and the non-SWD 50-200. The 40-150 weighs about a quarter of the 50-200, and is native m4/3 as well, but the 50-200 is faster and just a lovely lens. I also have the Panasonic 100-300, but that seems a bit long. I will be at the club level at the U.S. Open this week and really would like to (try to) get some sharp photographs. I basically can only fit the camera and one of these lenses, since there is other material I need to bring. No tripod or monopod or other support, and one has to be considerate of others' views, too. Any thoughts?