40 megapixel CCD sensor provides a top resolution of 7264x5440 Fully weather sealed and coldproof design resists rain, snow, dust and other environmental hazards during field use 14 Bit RAW files in Pentax PEF and Adobe DNG formats Dual slot SD/SDHC memory card support Responsive 11 point SAFOX IX+ autofocus system features a light wavelength sensor for improved focus speed even in different lighting environments Technical Details Brand Name: Pentax Model: 645D Optical Sensor Resolution: 40 MP Optical Sensor Technology: CCD Item model number: 645D Batteries 1 Lithium ion batteries required. (included) Product Dimensions: 4.7 x 6.1 x 4.6 inches ; 3.5 pounds