Currently there are 13 native Telephoto Prime lenses for Sony A99 and 9 of these lenses are autofocus (AF) type.
A99 also has a sensor based image stabilization system which means that all of these lenses will be stabilized when used on A99.
Since Sony A99 has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 2 Telephoto Prime lenses with Weather Sealings.