The Fujinon XF 90mm f/2 R LM WR is a prime lens with a focal length equivalent to 137mm in 35mm format, specifically designed for the Fujifilm X-series mirrorless system. The optical structure consists of 11 elements arranged in 8 groups and includes three extra-low dispersion lenses that actively work to minimize chromatic aberrations and internal reflections. The maximum aperture of f/2 allows for precise depth-of-field management and facilitates use in suboptimal lighting conditions, while the seven-blade rounded diaphragm contributes to a natural rendering of out-of-focus areas. Regarding the focusing system, the lens implements a quad linear motor that ensures a fast and silent response, proving effective even when tracking moving subjects. The lens body is equipped with a physical aperture ring and features a robust construction with seven weather seals that make it resistant to dust, moisture, and temperatures as low as minus ten degrees Celsius. The minimum focusing distance is 60 centimeters, with a maximum magnification ratio of 0.2x, making it a suitable tool for portraiture and short-range sports photography.