Currently there are 48 native Wideangle Prime lenses for Canon 1D C and 24 of these lenses are autofocus (AF) type.
Canon 1D C doesn't have a sensor based image stabilization system but 4 of these Wideangle Prime lenses features optical image stabilization.
Since Canon 1D C has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 12 Wideangle Prime lenses with Weather Sealings.