Currently there are 8 native Standard Zoom lenses for Olympus E-1 and all of these lenses are autofocus (AF) type.
Olympus E-1 doesn't have a sensor based image stabilization system but 2 of these Standard Zoom lenses features optical image stabilization.
Since Olympus E-1 has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 4 Standard Zoom lenses with Weather Sealings.