51.4MP CMOS Sensor - 43.8 x 32.8 mm Prime III Image Processor Anti-Alias Filter-Less Design 3.2" 1037K Dot Tiltable Air-Gapless LCD Show More The 645Z Medium Format DSLR Camera (Body Only) from Pentax features a 43.8 x 32.8 mm CMOS sensor with 51.4 effective megapixels. The sensor is designed without an anti-aliasing filter to maximize sharpness and details. RAW files can be recorded at 14-bit