Exif and DCF Exif is always used in conjunction with the term DCF (Design Rule for Camera File Systems). DCF is a file system standard designed to ensure compatibility for images using recording media between such devices as digital cameras and printers. This standard defines file name formats and folder structures. Conversely, Exif is a standard for defining how to store image data and camera information in files, and applies to the actual data itself. DCF-compatible devices allow image files to be easily exchanged, even between different series of products or the products of different manufacturers. Example 1: Images taken using Digital Camera A can be viewed on the LCD monitor of Digital Camera B. Example 2: Additional images taken using Digital Camera C can be recorded onto a recording media containing images taken using Digital Camera A. Example 3: Images taken using a DCF-compatible digital camera can be printed out on any DCF-compatible printer.