18mm fixed focal length, ensures fast focusing speed and stable image quality. 2High quality camera lens, compatible with most camera models. 33MP resolution, ensures low image distortion, excellent image sharpness and contrast. 4The F1.4 relative aperture, large luminous flux, good for low-light shooting. 537.9 degrees wide angle lens, help you largely expand the field of view. 6CS mount interface, easy to install and remove, convenient for using.