Thanks to a novel lens construction, it has been possible to avoid the optical distortion typically found in ultra-wide-angle lenses; thus, digital correction is unnecessary.
This feature contributes to the high resolution performance of the lens all the way to the corners of the image. The optical design consists of 10 elements in 7 groups, including 2 aspherical lenses and 3 ED lenses with extra-low dispersion. The edges of the seven aperture blades have been rounded to ensure the highest image quality. The lens is equipped with a distance and depth of field scale, allowing for pre-focusing, for example. With a maximum aperture of F2.8, the lens is also suitable for low-light conditions.
The short minimum focusing distance of just 18 cm allows for a pleasing background blur while maintaining the perspective characteristics of an ultra-wide-angle lens. The short flange distance of the FUJIFILM X mount effectively prevents vignetting in the corners of the image. Typical image defects, such as distortion and chromatic aberrations, are minimized. This guarantees high resolution performance all the way to the corners of the image.
