【E Mount Full Frame Lens for Sony】It's designed for full-frame Sony E-Mount cameras, supports Auto Focus and Manual Focus, it's quipped with quiet DSM stepping motor, can 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 low light environment. | 【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. At the same time, the lens adopts high-precision metal bayonet and gold-plated contacts, which can effectively improve signal conductivity and corrosion resistance. | 【Equipped with quiet DSM stepping motor】Through the AF/MF focus mode switch, you can quickly switch the focus mode. And the lens is equipped with a low-dispersion glass lens, which can effectively suppress the dispersion problem. | 【9 Optical Lenses in 8 Groups】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. And 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.