Canon 1Ds MIII has a Canon EF lens mount and currently there are 268 native lenses available for this mount.
Canon 1Ds MIII doesn't have a sensor based image stabilization system but 59 of these lenses already comes with optical image stabilization.
Since Canon 1Ds MIII has a Full frame sensor, it has a focal length multiplier of 1× so lenses will provide their original focal length on 1Ds MIII.
You may also also be interested in these:
Canon 1Ds MIII Lenses with Image Stabilization
Canon 1Ds MIII Lenses with Weather Sealings