The residue may permanently discolor the coating. Condensation On the Lens C ondensation or raindrops on the lens can distort or even totally obscure an image. When a camera is taken from a cool area into warm air, the lens frequently fogs up. This is a special problem in cool climates when camera equipment is often brought inside after being outside in the cold for some time. Even though moisture may be wiped off the lens, it may continue to fog up until the temperature of the lens equals the surrounding air.
Condensation can also take place within a camcorder and cause major problems.
For this reason most camcorders have a dew indicator that detects moisture or condensation within the unit and shuts it down until the moisture has evaporated. To control the effects of condensation you should allow 30 minutes or so warm-up time whenever you bring a camcorder from a cold to a warm environment. Rain Jackets A lthough use of a video camera in rain, snow, or wind-driven sand or dust is definitely discouraged, news stories often have to be shot under such conditions. In an emergency a plastic garbage bag can be used. Simply cut out a hole for the lens and use a rubber band to hold the plastic around the lens barrel.