The viewfinder also lets the operator play back video already recorded. Professional cameras employ black and white viewfinders because they are much sharper than color and easier to focus. Although these adjustments do not affect the actual shot, they can affect the decisions you make about the picture. The dioptor adjustment on the viewfinder should be set to your eye prior to shooting so that the viewfinder's monitor screen is as sharp as possible. Viewfinders also display important information such as tape usage, battery level, audio levels, and exposure data.
All viewfinders indicate that the camcorder is running.
Unlike film cameras, most video camcorders are relatively quiet. A battery powered field monitor should always be used. It provides the only real way to properly evaluate scene exposure, color and contrast. Reproduction without permission is strictly prohibited.