LENS CONSTRUCTION: The lens structure is 5 elements in 5 groups, 2 ED lenses, 1 hybrid lens and 1 glass aspheric lens, engineered for optimal image quality and performance across the frame. FOCAL LENGTH AND ANGLE: This 10mm prime lens delivers an ultra-wide 173-degree angle of view, making it particularly suitable for expansive scenes and architectural photography. APERTURE SPECIFICATIONS: Operating with a maximum and minimum aperture of f/5.6, this lens maintains consistent exposure control throughout its range. LENS TYPE AND MOUNT: Designed specifically as a manual focus prime lens for mirrorless camera systems, offering precise control over focus adjustments. PHYSICAL CHARACTERISTICS: Featuring compact dimensions with a thickness of 1.2 inches and weighing 0.75 pounds, this lens maintains a balance between portability and performance. 【Customer Support】We stand behind Brightin Star 10mm F5.6 Lens— 12-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