Native ISO vs extended

5Native and extended ISO refer to actual ISO settings and simulated ISO settings. Let’s say a camera has these ISO settings: L (low), 100-25,600 and H (High). Low would equate to ISO 50 while High would equate to ISO 51,200. If you set High the camera would set ISO 25,600 and then overexpose by 1 stop. As a result, image quality is comparatively lower than a shot taken within the native ISO range.