Nikon's first FX format camera to feature high-definition movie recording offers photographers a whole new level of creative flexibility. The D3S features a highly sensitive 12.1 megapixel FX format CMOS sensor that boasts an ISO range of 200 to 12800. The D-movie function offers superior movie capture in stereo* sound and features a Save Selected frame option to speed up productivity. Nikon's acclaimed 51-point AF system offers high sensitivity in low-light and superb performance when tracking fast moving subjects. An advanced image sensor cleaning function reduces the impact of dust spots and three alternative crop modes enhance shooting flexibility. The EXPEED image processing engine and expansive buffer enables you to shoot up to 9 fps for extended bursts