Small body, lightweight The maximum diameter and length of the lens is about 67?88mm, and the net weight is only about 346g. The lightweight design is good for long-time handheld shooting and video recording. Equipped with Fn function button The lens is equipped with an Fn custom function button. You can quickly call up one function menu or perform one shortcut operation by reasonably assigning the button, it can improve your creative efficiency. Equipped with AF/MF focus mode switch Through the AF/MF focus mode switch, you can quickly switch the focus mode. Equipped with quiet DSM stepping motor Compared with traditional DC motors, a digitally controlled stepping motor (DSM) has a quick start-stop response, high focusing accuracy, and quieter focusing action, which is suitable for photo shooting and video recording. F1.8 large aperture Flexible use of F1.8 large aperture, easy to obtain soft blur effect, you can also use low sensitivity and higher shutter to shoot in a low light environment. With 9 optical lenses in 8 groups, the nano-multilayer coating process The lens adopts an optical structure of 9 lenses in 8 groups, and the lens has a nano-multilayer coating process, which can effectively increase the light transmittance and suppress back-light ghosts and glare? Equipped with a low-dispersion lens The lens is equipped with a low-dispersion glass lens, which can effectively suppress the dispersion problem. 7 circular aperture blades The lens is designed with 7 circular aperture blades. It can shoot circular diffuse spots. It can also take pictures with 14 star effects if the aperture is appropriately reduced. USB Type-C firmware upgrade Equipped with a USB Type-C interface, you can download the latest firmware to upgrade the lens to keep the lens at its best performance. Metal bayonet, gold-plated contacts The lens adopts high-precision metal bayonet and gold-plated contacts, which can effectively improve signal conductivity and corrosion resistance. At the same time, it can maintain reliable communication between the camera and the lens, and realize functions such as autofocus, aperture control, and EXIF information transmission.