Canon EOS Rebel XSi Digital Camera (a.k.a. 450D) (Black) (Camera Body) + Sigma Zoom Super Wide Angle 18-250mm f/3.5-6.3 DC OS (Optical Stabilizer) HSM Lens for Canon Digital EOS

12.2-megapixel APS-C Size CMOS sensor and DIGIC III image processor 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 lenss marked focal length when attached. Canons DIGIC III Image Processor dramatically enhances image quality and speeds up all camera operations for intuitive operation. It works in concert with the EOS Rebel XSis sensor to achieve unprecedented levels of performance in all lighting situations.