The XF10-24mmF4 R OIS WR is an ultra-wide zoom lens that utilizes the same optical design from the original XF10-24mm OIS lens to provide similar image-resolving performance. and a maximum aperture of F4.0 across the zoom lens’s entire focal length range. Improvements include an f-stop scale on its aperture ring, an Auto-position lock, and a new weather-resistant structure. Additionally, the internal structure has also been redesigned to make the focus and zoom rings slimmer, which reduces the lens’ overall weight by 25 g (.88 oz). Lastly, Optical Image Stabilization has also been improved by 1 stop, bringing the total stabilization effect to 3.5 stops.