Previuosly I have used this camera at the higher 6400. All of a sudden I cannot get the camera to set this ISO only upto 3200. Having checked C.Fn1-3 to ensure this was set correctly (which it was) I'm abit bemused why neither of my boddies will allow me to select 6400 or the lower ISO 50. The only thing I can recall being changed is a firmware update to v1.3.0.
Anyone any idea's?