About this item F1.7 Large Aperture: Beautiful natural bokeh, 9 aperture blades, creating a dreamy and artistic blur effect, effectively highlighting the subject. Efficient & Reliable Autofocus: The built-in STM stepping motor provides the high driving force for precise autofocus and tracking focus, while supporting eye/face AF for better response, lower latency, and reduced vibration 11 Elements ln 9 Groups: Optical structure of 11 elements in 9 groups, including 1 ED lens, 2 high refractive index lens, 1 aspherical lens, and high-definition multi-layer coating Lightweight Design: Weight 170 g, the compact and lightweight body allows you to capture inspiration at your fingertips. This portability positions it as a favorite for those impromptu shoots, be it on bustling city streets or serene landscapes The bottom of the lens is equipped with a micro USB interface, which is convenient for future firmware upgrades and makes its performance stronger › See more product details