Currently there are 22 native Wideangle Prime lenses for Sony A7 and 14 of these lenses are autofocus (AF) type.
Sony A7 doesn't have a sensor based image stabilization system and none of these lenses have optical Image Stabilization.
Since Sony A7 has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 11 Wideangle Prime lenses with Weather Sealings.