Description: 1) A professional lens to capture a wide view 2) High Precision, Ultra-Low Dispersion and Aspherical lens. It carries two high-precision aspherical lens elements, one of which adopts an extra-low dispersion lens element, which effectively compensates for various optical aberrations, minimizes chromatic aberrations, and provides excellent sharpness and color correction. 3) Precisely Machined Abnormal Dispersion Lens: YN14mm 2.8 adopts 1 piece of abnormal dispersion lens, which helps to better control the dispersion problem from super wide angle and large aperture, and helps to improve the second-order spectrum. 4) Optical glass lens, multi-layer coating: It adopts optical glass lens and multi-layer coating technology to effectively increase light transmittance and minimize ghosting and backlight glare. 5) Firmware update: YN14mm F2.8 is equipped with USB port. Users can download the latest firmware from YONGNUO official website and update the lens to keep the best compatibility and performance. 6) F2.8 large aperture: With bright F2.8 and large aperture, blur background, highlight subject. 7) Focus Modes: Auto Focus (AF) and Manual Focus (MF). YN14mm F2.8 supports auto focus and manual focus. The focus mode can be selected according to practical needs. 8) 7 pieces of aperture blades: YN14mm F2.8 has 7 pieces of aperture blades, which helps to take photos of defocused circular dots and helps to reduce the aperture and take photos of the effect 14 stars. 9) Durable metal bracket: YN14mm F2.8 adopts chrome-plated and high-precision metal bracket. It is portable, corrosion-resistant and very camera-compliant. 10) Focus Distance Indicator: YN14mm F2.8 is equipped with a focus distance indicator. It is convenient for you to judge distance and depth of field. Features: Super-wide diagonal angle of about 114 to facilitate the vast landscape and giant structures, easier to show a grand and formal atmosphere; with bright F2.8 and large aperture to better achieve background blur and subject highlight effects. Supports autofocus (AF) and manual focus (MF) modes; With focus distance indicator, which allows you to judge distance and depth of field. With two high-precision aspherical lens elements, adopts no extra-low dispersion lens element, which effectively compensates for various optical aberrations, minimizes chromatic aberrations, and provides excellent sharpness and color correction. Also adopts 1 anomalous dispersion lens, which helps to better control the dispersion problem from super wide angle and large aperture and improve the second-order spectrum. Adopt optical glass lens and multi-layer coating technology to effectively increase light transmittance and minimize ghosting and backlight glare. Has 7 aperture blades, which helps to take photos of defocused circular dots and helps to reduce the aperture and to take photos of the 14 star effect. Equipped with USB port and users can download the latest firmware from YONGNUO official website and update the lens to keep the best compatibility and performance. With high-precision chrome-plated metal bracket, portable, corrosion-resistant and highly compatible with the camera; and metal contacts adopt or plated technology for excellent signal transduction.