1,Ultra Wide Angle Lens: F15mm F4.0 ASPH full frame, field of view angle up to 114 degree, ultra wide perspective to accommodate a wider photographic field of vision, bring you more creative space in architecture, scenery, figures, documentary photography can bring stronger visual effects. 2,Effectively Control Aberration: The use of 2 aspherical glass (ASPH), effectively control aberration, reduce weight and size at the same time to provide better optical performance. 3,Low Reflection Multilayer Coating: With 3 low dispersion glass (ED), effectively reduce the dispersion aberration. 2 aspherical glass (ASPH) and 5 high refractive index glass are used to control distortion and ensure the same excellent high picture quality from center to edge. 4,F4.0 Large Aperture: Maximum aperture F4, minimum aperture F22, gear aperture mechanism, effectively prevent aperture miscontact to provide better experience. 5,10 Aperture Blades: Using 10 circular aperture blades, the small aperture will present gorgeous star, improve the image and bring you a better visual experience. 6,77mm Circular Filter: The front end of the lens adopts non bulb lens design, and can be installed 77mm diameter circular filter to meet your use needs. 7,Compatible Models: Compatible for R, RED, R3, R5, R6, RP and other cameras, to meet the needs of different cameras. You can choose according to your camera model. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.