The EOS-1D Mark III has a new 10 megapixel CMOS sensor (APS-H size) with Canon's EOS Integrated Cleaning System and a 3.0-inch LCD monitor with Canon's Live View technology. The 1D Mark III has a redesigned 100% viewfinder, a new 45-point AF system, and can shoot up to 10 fps continuously with a maximum burst of 110 shots. Dual "DIGIC III" Image Processors work in tandem to speed up every process while refining image quality; a new, lighter body has improved weather sealing and shutter durability.Image Quality on this Camera is exceptional - especially in low light situations. The new battery design makes it a much lighter camera than the other D series.The shutter is much more quiet than the 1DIIn and has a life of 300000 clicks.The software system is an big improvement on previous models - plenty of custom controls and easy to navigate