Thank you both very much, I have since got hold of both Salt and Keating’s works. I already own Visions of light but it had slipped my mind, so I will give it another thorough watch.
Ultimately I want to chronicle the evolution of cinematography from silent film era until the new rise of digital, and have found a couple of insightful book regarding the shift into digital, however if there is any other particular book, magazine (am already scouting through all recent American Cinematograher issues) or Cinematographer (also looking into Zilmos Szigmond and Yuri Neyman’s GCI) who are doing anything particularly relevant to research.
Once again thank you very much for your time