A plastic sheet with a photosensitive emulsion that comes in various formats for different cameras such as 35mm, 110, 120 and 220. Film was never considered analog until digital cameras came on the scene and stored their images in a digital format in memory. Nevertheless, "old fashioned" plastic-based film is used to create an analog of the actual scene. Analog film has nearly infinite resolution with its resolution quality based on the construction of the lenses. Digital film is based on the number of pixels recorded by the camera. See digital camera and digital photography.