Alex Jansen, who is currently on a deployment in Afghanistan, recently created this video showing off the weather and dust sealing capabilities of his Pentax K-5 and K-7 cameras. I know that even though my Canon 1D claims to be 'weather and dust resistant' it would be a cold day in hell before I ever voluntarily did something like this to my camera (and lenses!). Alex is clearly confident in the ruggedness of these two cameras - I will admit that I'm incredibly impressed that the build of Pentax cameras gave Alex the confidence to do this. I'd be cringing every step of the way - he doesn't even hesitate. Would you be willing to do this with your Canon or Nikon?
Alex is currently chronicling his time on deployment with some very eye-opening photos, which can be seen here. Well worth a look!