Af 56mm F1.7 is an autofocus lens suitable for X-mount, with 11 elements in 9 groups. The focus distance is about 0.55m-Infinite, and noiseless Stm focus motor can accurately control the moving position and bring accurate and smooth focusing.Auto Focus Large Aperture Portrait LensNew Generation Lightweight SeriesGolden Portrait Perspective56mm F1.7 is a full-frame equivalent focal length of about 85mm, with a golden portrait perspective, bringing just the right three-dimensional sense of characters and background perspective.New Generation Lightweight Series56mm F1.7 Xf is Viltrox's new generation of lightweight series autofocus large aperture mid-telephoto prime lens with higher cost performance.stm Stepping MotorEfficient and Reliable Autofocus: Using Stm silent motor to achieve precise and fast autofocus, even novices can get started quickly.Support Eye/Face AFWhether it's video or photo, the joy is given by autofocusLightweight DesignCompact/lightweight design brings portability, coupled with a retro and artistic appearance. It makes you more willing to take it with you and create more themes as you like.Reliable Video Shooting with Subtle Breath EffectThe 56mm F1.7 has comprehensive and reliable video shooting capabilities, supports camera body anti-shake, and has low distortion. The breathing effect is almost imperceptible when the focus changes, and the story on the screen is more immersiveLightweight Compact and PortableMade of specially made lightweight materials and lightweight design, you can hang it up and put it down with you from the streets to scenic spots to meet inspiration unexpectedly and capture the moment..