Feature: 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. Specification: Item Type: Full Frame Lens Weight: 820g/28.9oz Material: Metal and optical glass Frame: Full frame Aperture Blades :10 pieces Focal Length :15mm/0.59in Maximum Aperture :F4 Minimum Aperture :F22 Lens Structure :9 groups of 13 pieces Field Angle :114 degree Nearest Focusing Distance: 0.4m/1.3ft Aperture Ring: a graded aperture Lens Antishake: No anti shake Focusing Mode: Manual focusing Filter Size: 77mm/3in Lens Support Bayonet: R Mount Compatible Models: for R, RED, R3, R5, R6, RP and other cameras.. Package List: 1 x Lens1 x Front Lens Cover (installed)1 x Rear Lens Cap (installed)1 x Instruction Manual