FUJINON Weather resistant prime lens for Fujifilm X Mount. The XF23mm F2 R WR is a wide-angle lens with advanced image resolution, capable of drawing out the full performance of Fujifilms proprietary X-Trans CMOS sensor. It has a similar size & design flair of the existing XF35mm F2, to make up a stylish collection of compact F2 lenses. The inner-focus AF system uses a stepping motor to drive the focusing group of lens elements for silent & fast autofocus. The metal exterior gives a sense of premium quality & robustness, & the aperture ring & focus ring have been designed for optimum operability. The lens is also weather & dust resistant & operates at temperatures as low as -10C, making it an ideal choice for outdoor photography. Advanced image quality The lens consists of ten elements in six groups, including two aspherical elements. The optimum positioning of the aspherical elements ensures flatness of the image plane for edge-to-edge sharpness. The aspherical elements are used as part of the focusing group to minimize performance fluctuations between different focal distances. Compact, lightweight & stylish design for great operability The lens weighs just 180g. The metal exterior, modeled after the design of XF35mm F2 R WR, gives a sense of premium quality & robustness. The compact & stylish form factor almost completely eliminates mechanical vignetting when using the optical viewfinder on the FUJIFILM X-Pro 2 & X-Pro 1 cameras. The aperture ring & focus ring have just the right amount of clicking & torque for great operability. Fast & silent autofocus The inner-focus AF system uses a stepping motor to drive lightweight focusing elements for silent & fast autofocus. When combined with the phase detection AF system of FUJIFILM X-Pro 2 & X-T2, the lens can focus in an astonishing 0.05 seconds Weather & dust resistant, capable of operating at temperatures as low as -10C The lens barrel is sealed to make it weather & dust resistant, & capable of operating at temperatures as low as -10C.