【E Mount Full Frame】 Yongnuo 35MM F2 Lens for Sony, it has F/2 large aperture, it's easy to get soft blur effect. it’s small and lightweight, the net weight is only about 295g. This compact, lightweight lens is ideal for both full-frame and APS C cameras, on APS-C format E-mount bodies it provides equally high quality. | 【9 elements in 8 Groups】The structure which is composed of 9 elements 8 groups with nano-multilayer coating effectively improves the light transmittance and suppresses back-light ghosts and glare. And it's 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. | 【DSM Digital Stepping Motors】Compared with traditional DC motors, digital stepping motors (DSM) have fast start-stop response, high focusing accuracy, and quieter focusing actions, which are suitable for photo shooting and video recording, It has Fn custom function button, the function menu or shortcut operation can be quickly used to improve the efficiency of creation. | 【USB Firmware Upgrade】With a USB Type-C interface on the lens, you can download the latest firmware for upgrade to keep the lens at its best performance. Various aberrations can be compensated by an aspherical lens integrated, Equipped with a low-dispersion glass lens,which can effectively suppress the dispersion problem caused by wide-angle. | 【Metal Bayonet and Contacts】 The use of high-precision metal bayonet and gold-plated contacts effectively improves signal conductivity and corrosion resistance. At the same time, it allows the camera and lens to maintain reliable communication, and realizes functions such as Auto Focus, aperture control, and EXIF information transmission.