I searched several Posts and what I'm about to ask looks as if its unique. I'm not stuck in any scenario just curious. I can adjust the ISO setting in my camera. Some cameras have auto-iso. When it comes to film is adjusting your ISO the equivalent of changing between rolls of film? Would you have to carry 5 different types of film to get the same shots that 5 different ISO settings in a Digital camera has? Again I don't have a particular issue just would like to know.