Fujinon xf16-80mmf4 R OIS WR has a maximum aperture value of F4 throughout the focal length of 16-80mm (equivalent to 24-122mm in the 35mm film format). This lens has a minimum shooting distance of 35cm over the entire zoom range, which gives a maximum shooting magnification of 0.25x. The compact and lightweight lens weighs only 440G which is approximately 40% lighter than an equivalent lens for a 35mm format system. When attached to an x-t3 the kit weighs only 979G and 823G when combined with x-t30, making it the ultimate travel combination. This new standard zoom lens features 6.0-Stop OIS, meaning you can comfortably shoot in a wide variety of situations from a Night scene or indoors without worrying about camera shake.Just upgraded to this lens and it looks and functions extremely well giving great images. Very pleased. Yet to try it on my X Pro3 but balances well on the XT3.