Currently there are 71 native Wideangle Prime lenses for Sony A7R and 52 of these lenses are autofocus (AF) type.
Sony A7R doesn't have a sensor based image stabilization system and none of these lenses have optical Image Stabilization.
Since Sony A7R has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 41 Wideangle Prime lenses with Weather Sealings.