Think Tank sells a product called a Hydrophobia. These rain covers come in covers sized for a pro size DSLR with up to a 70-200 f2.8 lens attached, one that can accommodate a 70-200 that has a flash on it and one that can accommodate a 300 to 600mm lens. The
Hydrophobia® protects valuable photo equipment from the elements during
active use. Keep shooting in the rain, snow or blowing sand. The Hydrophobia
gives a photog peace of mind that they can capture the moment in almost any
weather!
You can buy them directly from www.ThinkTankphoto.com
