The Canon EOS-1D X is the company's first pro model with an entirely new AF sensor since way back in 1998, when the previous 45-point sensor launched with the EOS 3 film camera. In the diagram above, the locations of all 61 AF points are marked with squares. The f/2.8 high-precision diagonal cross-type points are shown in blue, while the f/5.6 cross-type points are within the red box. The two purple boxes mark the location of the f/4.0 cross-type points. The remaining points, shown in black, are all f/5.6 horizontal types.