Lightweight lens, ideal for portraits. Image sensor standard: APS-C. Lens mount: Sony E-Mount. Focus: Automatic with eye detection. Filter thread diameter: 52 mm. Interface for firmware upgrade. Full metal housing. With its large aperture, autofocus, and low weight, the 56 mm F1.8 lens is perfect for a variety of photographic subjects. Stepper motor, fast and quiet. The TTArtisan 56/1.8 lens features a design that ensures silent and quick autofocus to capture extraordinary moments. The precise and fast eye detection makes it easy to capture wonderful moments while photographing and helps produce smooth images when recording videos. Ideal focal length for portraits. 56 mm on APS-C corresponds to 84 mm on a full-frame camera, making it perfect for portrait photography. Additionally, it can highlight your subject and create a soft blur effect in the background. The lens barrel and mount are made of aviation aluminum, and the metal structure fits perfectly with the cameras.