Canon 1D X III has a Canon EF lens mount and currently there are 250 native lenses available for this mount.
Canon 1D X III doesn't have a sensor based image stabilization system but 76 of these lenses already comes with optical image stabilization.
Since Canon 1D X III has a Full frame sensor, it has a focal length multiplier of 1x so lenses will provide their original focal length on 1D X MIII.
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Canon 1D X III Lenses with Image Stabilization
Canon 1D X III Lenses with Weather Sealings