Greetings all. I'm new to this forum, and new to M 4/3, having used Nikon for many years. I'm currently putting together a system wih an E-M1 for travel/backup, or maybe full time. I'll need a long telephoto, and was wondering if the upcoming Panasonic 100-400 would be able to use it's IS, along with the in body IS of the Oly, and also if that combination would be weather sealed. I suspect the answer to the latter is "no," but hopefully someone better versed in these systems can give me a definitive answer. If no, I'll be going for the new Oly 300, but I like the longer reach and the zoom range of the Panny. Thanks in advance for your input.