Currently there are 24 native Wideangle Prime lenses for Fujifilm X-T1 IR and 14 of these lenses are autofocus (AF) type.
Fujifilm X-T1 IR doesn't have a sensor based image stabilization system and none of these lenses have optical Image Stabilization.
Since Fujifilm X-T1 IR has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 9 Wideangle Prime lenses with Weather Sealings.