The image PROGRAF iPF6400S printer was designed for professionals in the commercial photography, signage display, reprographic and proofing markets that seek the highest possible standards for quality-control and image reproduction, while maximizing productivity. As an optional add-on to the iPF6400S printer, the SU-21 Spectrophotometer features a scan speed of up to 10 inches per second and can accommodate media of different thicknesses (Canon or non-Canon branded) thanks to the deviceâ??s mobile carriage which opens and closes automatically. The device attaches directly onto the front of the iPF6400S printer and includes a user-switchable UV blocking filter that can be switched on and off according to paper type, eliminating the need to purchase individual sensors.