In my first photojournalism class in college, we were taking current news shots. That day, it happened to be storming, and our professor had bought each of us a water proof camera case. He said it was the same kind the professionals used and to consider it a gift (meaning we could keep them). After all the hype, he pulled out Ziplocs!! Haha!! They worked great and the shots didn't have a filmy look to them at all.