Currently there are 19 native Telephoto Zoom lenses for Sony A7R and 18 of these lenses are autofocus (AF) type.
Sony A7R doesn't have a sensor based image stabilization system but 13 of these Telephoto Zoom lenses features optical image stabilization.
Since Sony A7R has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 18 Telephoto Zoom lenses with Weather Sealings.