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Definition: The viewfinder is the small window at the top and back of the camera that you use to frame your photograph. Some cameras contain a traditional viewfinder, and some don't. Those without a viewfinder use the "live" view on an LCD, or liquid crystal display, to frame the photos.

Two different types of viewfinders appear in a digital camera.

An optical viewfinder is an actual window that attempts to match the path of the main lens. Some high-end digital cameras link the optical viewfinder to the lens, meaning the viewfinder looks through the lens, using a series of mirrors and prisms.

An electronic viewfinder, or EVF, is a tiny LCD that displays the image that will be taken. EVFs can display information about the camera's settings, but they can be tough to see in low light.

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