Currently there are 41 native Standard Prime lenses for Sony FX5 and 32 of these lenses are autofocus (AF) type.
FX5 also has a sensor based image stabilization system which means that all of these lenses will be stabilized when used on FX5.
Since Sony FX5 has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 21 Standard Prime lenses with Weather Sealings.