Many modern digital cameras have a very wide range of ISO values, particularly at the high end where technological advancements have led to stratospheric ISO ratings that were once beyond a photographer’s wildest dreams. Black and white film users learned to live with the grain structure of TMZ or heavily pushed Tri-X to reach ISO 3200; colour negative users tried to get by with ISO 1600 results that were average at best, while colour slide film users would have been happy to […]