These lenses include wide-angle lenses, telephoto lenses, and zoom lenses. A wide-angle lens provides a wider view of a scene than a standard lens does. A telephoto lens makes objects appear closer. A zoom lens combines features of standard, wide-angle, and telephoto lenses. The image in the viewfinder appears on a flat screen built into the top of the camera.
Photographers find such a screen helpful in composing a picture.
They usually hold it at the chest or waist and look down into the viewfinder. The image appears reversed from left to right. Electronic devices inside the cameras automatically adjust the focus, set the light exposure and the shutter speed, and advance and rewind the film. A built-in electronic flash automatically supplies light when too little light reflects off the subject. These cameras are popular among amateur photographers.