Dealing with lens fogging up

[writersblock42]

Last year, I had an issue when we were in Al with the humidity fogging my lens up. Any tips to avoid that while in the world?

 

[boBQuincy]

Putting the camera in a plastic bag before leaving the room is supposed to work. Take the camera out of the bag when it has warmed up to the outside temperature and the lens should not fog. Others on the photography board may have some ideas.