This exciting prime lens provides ultra wide-angle coverage up to 113 Degree angle of view. The tiny size & light weight match perfectly with mirrorless cameras and are suitable for use with gimbals. 2 aspherical elements plus 3 extra-low dispersion elements successfully correct chromatic aberration, realize close-to-zero distortion & deliver excellent corner to corner sharpness.Zero DistortionPairing an ultra wide-angle field of view with an especially compact design. The lens offers a 13.5mm equivalent focal length. As a Zero-D lens, this 9mm f/2.8's optical design is specifically designed to minimize any optical distortion to the lowest. This is extremely useful for both architectural photographers and aerial videographers. This also saves them a lot time in post-processing.f/2.8 Maximum ApertureThe optical design incorporates a pair of aspherical elements and three extra-low dispersion elements to control both spherical and chromatic aberrations for improved sharpness and reduced color fringing. Bright f/2.8 maximum aperture is well-suited to working in low and difficult lighting conditions.Lightweight DesignThe tiny size & lightweight design earn this lens a permanent spot in the camera bag. Additionally, a petal-shaped lens hood is also included to reduce flare and ghosting when working in strong lighting conditions. Its sleek and lightweight design is well-matched to mirrorless bodies and is ideal for everyday sh