With the P 65+ and the P 40+ you can capture your images with the full resolution, e.g. 60 megapixel, or you can use the Sensor+ technology and go for a faster workflow, capturing images with a quarter of the resolution, e.g. 15 megapixel and gain 4 times higher ISO speeds, up to ISO 3200.
Capturing with Sensor+ is especially well suited for shooting in low light conditions. With Sensor+ there are no crop or lens factors; you get the maximum wide angle performance with your lenses.