12.2 Megapixel CMOS (APS-C) sensor and DIGIC 4 Image Processor for high image quality and speed. Canon’s CMOS (Complementary Metal Oxide Semiconductor) sensor captures images with exceptional clarity and tonal range, and offers the most pixels in its class. It offers many of the same new technologies to maximize each pixel’s light gathering efficiency that were first seen with the professional EOS-1D Mark III model. It’s an APS-C size sensor (22.2 x 14.8mm), and there's an effective 1.6x increase in the lens's marked focal length when attached. And buy this Camera you can Get Free Shipping on a Canon EOS Rebel T3 SLR Camera w/ 18-55mm IS II Lens Kit for $329.99 after instant rebate at Rakuten.com, a $120 Savings!