MANUAL LENS DESIGN: This product is a manual lens without an auto-focus function, specifically engineered for mirrorless cameras with a focus type requiring manual operation for precise control and creative expression. OPTICAL SPECIFICATIONS: Features a fixed 10mm focal length with F5.6 aperture, incorporating a fisheye lens design that delivers an extraordinary 173-degree angle of view for ultra-wide-angle photography capabilities. LENS CONSTRUCTION: Utilizes an advanced optical design with 5 elements in 5 groups, including 2 ED lenses, 1 hybrid lens, and 1 glass aspherical lens to maintain image quality and minimize distortion. PHYSICAL CHARACTERISTICS: Constructed with a compact form factor measuring 1.2 inches in thickness and weighing 0.75 pounds, making it suitable for convenient transportation and extended use during photography sessions. MOUNT COMPATIBILITY: The brand name listed herein are for reference purposes only, Brightin Star is an independent brand. Designed specifically for Sony E-mount mirrorless camera systems, supporting APS-C format sensors. 【Customer Support】We stand behind Brightin Star 10mm F5.6 Lens— 24-month warranty and friendly 24-hour responsive after-sales service. Brightin Star Fisheye Lens for Mirrorless Cameras, Manual Focus Prime Ultra-Wide Angle APS-C Lens