I was just checking out my 3.5f and I never noticed that there are these mysterious icons picture where the little silver turning button is? It show a "COL with sun icon and few others. I turned the button and there seems to be no difference in where light meter needle is positioned. Anyone know what the purpose is?
If so, this was just a reminder as to what type of film was loaded in a camera. It has no effect on operation, metering, etc. I know on older models that you turned one direction to change the film type indicator and the other direction to change the film speed indicator.