Auto ISO is not doing what I expect so there must be something here that I don't understand. I am using it with settings default ISO 200, max 800, min shutter speed auto. With a 18-55 lens at 18mm, I am getting it using ISO 400 with a shutter speed of 1/6400 second. I don't understand why it isn't selecting ISO 200 when there is plenty of light. I am using aperture priority