The D7100 marks an exciting advancement in image quality for high-resolution DX-format cameras. Nikon specially designed its 24.1-megapixel DX-format CMOS sensor without using an optical low pass filter (OLPF), resulting in the purest, sharpest images using D7100's DX-format CMOS sensor. Combine that with fantastic ISO performance at both ends of the spectrum—down to ISO 100 and up to ISO 6400—the processing speed and intelligence of EXPEED 3 and the extra lens reach of a 1.5x crop factor, and the D7100 is the ultimate tool for those seeking a lightweight DX-format HD-SLR.When the action speeds up, fire a blazing fast 6 frames per second continuously for up to 100 shots. the D7100 uses 51 focus points, including 15 cross-type sensors for detecting both vertical and horizontal contrast variations, to achieve fast, precise focus. The central cross-type sensor works all the way down to f/8, a huge advantage when using compatible teleconverters. At the same time, a highly accurate 2016-pixel RGB sensor evaluates every scene, taking into account brightness, contrast, subject distance and color, for spot-on auto operations like Face-Priority and full-time autofocus during video capture.