All Nikon 1 series cameras had the same sensor, a 1-inch type. The hybrid auto-focus feature of the Nikon 1 series was claimed to be the fastest in the world at the time of its introduction. This best-in-class auto-focus is one of the reasons that the Nikon 1 line is amazing for aquarium photography. The line also has one of the best continuous shooting features compared to other mirror-less cameras, and far better than even the high-end DSLRs.