645 Pro Mk III is an iPhone camera replacement app similar in appearance to a modern DSLR camera. It provides real-time ISO and shutter-speed readings, Ev, real-time GPS data and a choice of histograms. Many aspects of the interface can be customized. Its Film Modes are inspired by classic film stock as used by top photographers from the 1960s through to the present day. They can be edited and saved as custom, personalized films. Meanwhile its unprocessed images are just that, ready for later post-processing or to be used “as is” for reportage. Includes the ability to save in TIFF format.