Currently there are 12 native Macro Prime lenses for Sony A700 and all of these lenses are autofocus (AF) type.
A700 also has a sensor based image stabilization system which means that all of these lenses will be stabilized when used on A700.
Since Sony A700 has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 2 Macro Prime lenses with Weather Sealings.