Chris T wrote:
One of my dig cams gets all fouled up when I set it to any other number than the one it was designed to cover. That number is 51,200. If I set it for less ... it doesn't seem to know which way is up, anymore. So, after much experimentation - I've returned it to its maximum threshold. What about you? ... Have you done similar experimentation? ... Which ISO has turned out to be right for you? ... Do you change it, or set on Auto and forget it?
I set ISO to a reasonable number for the situation. Mostly 400-800 for day lite shooting. That gives me the widest range of control of aperture and shutterspeed. Shooting inside museums, churches, etc., I have no problem upping to 12,800, picking up minimal noise. Can't remember ever needing ISO higher than that, but maybe I'll do some experiments so time.