I know that the camera isn't a weather-proof one, so I was wondering. This weekend they're announcing cloudy weather with a slight possibility of snowfall and about -15°C in the mornings. Can I subject the camera to that? I was planning on taking two lenses, a 17-55 f/2.8 and a 70-200 f/4L IS. I'm pretty sure the 70-200 is made to seal tight, but the 17-55 definitely isn't. How would they react to possible light snowfall and the cold? I'm definitely not planning on using the setup in a snowstorm or burying them in a foot of snow, I was just wondering.