I have discovered a feature of my D800E which is new to me. Since discovering the convenience and configurability of Auto-ISO around a year ago, I have had the feature permanently enabled on both my cameras. Looking through some recent photos, taken in low light, I was surprised to see that EXIF reported my in-camera 'high-ISO NR' setting as 'low'. Since I always keep this 'off', I was puzzled. Long story short: after a trial, I discovered that the camera automatically switches to the 'low' NR setting somewhere between an ISO of 1100 and 1400, and stays on for higher ISO settings (as set automatically); even though the internal software switch remains at 'off'. I have gone back to the manual, and this feature is not mentioned.