Number of Iris Blades: 7 Blades Focus Type: Wide Angle-Prime Type: Fixed Focus Lens Full Frame: Yes Focus Mode: AF Lens Type: Auto Focal Length: 14mm Maximum Magnification: 0.150 times Package: Yes Model Number: 14mm F2.8 Macro Magnification: 0.150 times Caliber: 86mm Lens Stabilization Type: None Minimum Aperture: F22 Maximum Aperture: f/2.7 Weight: 701g-800g A professional lens to capture a Wide View ---- YONGNUO Ultra Wide Angle Main Lens YN14mm F2.8 -- 114 Ultra-Wide Angle Diagonal viewing angle is about 114. For YN14mm F2.8 helps to collect the vast landscape and giant structures, it is easier to show a grand and formal atmosphere. -- Ultra-Low Dispersion Lens and Precision Machined Aspherical Lens YN14mm F2.8 carries 2 pieces of aspherical lens. One of the aspherical lenses adopts an extra-low dispersion lens, which effectively compensates for various optical aberrations, minimizes color difference, and provides excellent sharpness and color correction. --Precision Machined YN14mm 2.8 Abnormal Dispersion Lens adopts 1 piece of anomalous dispersion lens, which helps to better control the dispersion problem with super wide angle and large aperture, and helps to improve the second-order spectrum. -- Optical glass lens, multi-layer coating The whole series of this product adopts optical glass lens and multi-layer coating technology to effectively increase light transmittance and control backlight ghosting and glare. - Firmware Upgrade YN14mm F2.8 is equipped with a USB port. Users can download the latest firmware from YONGNUO official website and update the lens to keep the best compatibility and performance. -F2.8 Large Aperture With bright F2.8 and large aperture, blur background, highlight subject. -- 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. -- 7cps of diaphragm sheets YN14mm F2.8 has 7 pieces of diaphragm sheets, which helps to take photos of defocused circular dots or helps to reduce the aperture and take photos of 14 star effect. -Durable Metal Mount YN14mm F2.8 adopts high-precision, chrome-plated metal bracket. It is portable, corrosion-resistant and very camera-compliant. -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. -- Gold plating technology Metal contacts adopt gold plating technology to effectively improve signal conductivity and corrosion resistance. Specifications Focal Length 14mm Lens Structure 9 groups 12pcs Diaphragm Sheets 7pcs Minimum Aperture 22 Minimum Focusing Distance of about 0.2m Maximum Amplification Factor of about 0.15x DC Motor Drive System Diameter and Maximum length of approx. 86 105mm Weight Approx 780g -- Lens length is the distance from the mounting surface to the front end of the lens. -- Except for special instructions, the measurement and weight are only suitable for the lens. -- Aperture settings can be controlled by camera. MTF Curve Chart Lens Structure The above data is purchased based on YONGNUO Company's test conditions. Further notice will not be given if design and specifications change.