Currently there are 7 native Standard Zoom lenses for Sony A7 and 6 of these lenses are autofocus (AF) type.
Sony A7 doesn't have a sensor based image stabilization system but 4 of these Standard Zoom lenses features optical image stabilization.
Since Sony A7 has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 5 Standard Zoom lenses with Weather Sealings.