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A digital single-lens reflex camera (also called a digital SLR or DSLR) is a digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor, as opposed to photographic film.
Get the Best Viewfinder. By definition, a DSLR features an optical viewfinder that shows you the exact image the camera's lens is capturingâbut not all of these viewfinders are created equal. A mirror directs light from the lens to the viewfinder, which is one of two types.