Ultra-Wide: First 9mm Rectilinear lens for Full Frame Cameras Compact & lightweight: Super lightweight at 350g only Incredible Angle of View: First Full Frame lens provide stunning 135° angle of view Excellent Image Quality: Aspherical lens & Extra Low Dispersion lens ensure excellent image quality Sharp and clean Sunstars: 10-stroke sunstars Close focusing distances: as close as 12cm from the sensor