Now that the cold weather is upon us up here in Canada does anyone have any advise on how to try and stop condensation from forming on my camera when I come into a warm building from being outside shooting in the cold. I once went to a butterfly conservatory in the middle of the winter and my camera was very cold by the time I got there. The conservatory is so humid my lens fogged up immediately. I had to wait for almost 45 minutes before the condensation on my lens disappeared. There was so much condensation I was afraid to use the camera in fear I would damage the electronics inside. Any suggestions?