Used camera for sale Canon EOS 600D Sensor and Image Processor: Sensor Type: APS-C CMOS (22.3 x 14.9 mm). Effective Sensor Resolution: Approximately 18.0 megapixels. Maximum Image Resolution: 5184 x 3456 pixels. Image Processor: DIGIC 4 (provides good processing speed and natural colors). ISO Sensitivity: 100 to 6400 (expandable to 12800)