People live in fear of the Manual Mode all their life, never looking at it closely enough. The truth is, it much much easier to use it than you think. Here is all you need to know.
Extended ISO range is a completely artificial, conjured up set of ISO values that are purely created by the camera’s software manipulations. When actually used to take an image, the camera uses the highest native ISO value available and then boosts the exposure using the camera’s image processor.