Your camera’s viewfinder is a vital link in good picture-making:
• It shows exactly how much of the scene is visible in the shot – to ensure that no unwanted subjects (e.g. the microphone, or bystanders) are accidentally included within the picture.
• It enables you to arrange the shot accurately within the frame, composing the picture for maximum impact.
• It shows you exactly how much of the shot is sharply focused.
• It helps you to judge exposure and picture quality as you shoot.
• It can help when matching shots to other cameras; e.g. by showing their outputs combined with your own picture.
• Particularly when working in the field, it can be useful to monitor videotape playback of the scene you have just recorded.