Feature: 1. Wide Compatibility: Suitable for M mount cameras such as for M, M240, M3, M6, M7, M8, M9, M9p, and M10, ensuring wide compatibility and the ability to record wonderful images. 2. Standard Portrait Lens: Featuring a golden 50mm focal length, this lens is perfect for capturing portraits, landscapes, street photography, and more, delivering outstanding background blur and sharpness. 3. Larger Aperture: With a wide F1.1 aperture, this lens allows for greater light intake, enabling you to achieve dreamy background blur and create beautiful photos with remarkable visual impact. 4. 7 Layer Optical Coating: The lens is equipped with a 7 layer optical coating and a refractive index of 1.9, effectively reducing glare and producing clearer and more vibrant images. 5. Multiple Optimizations: Through meticulous corrections of spherical and chromatic aberrations, this lens excels in controlling dispersion for large aperture lenses, resulting in excellent contrast and sharpness at the focus point. Specification: Item Type: Prime Lens Material: Metal frame, optical glass Weight: Approx. 536g/18.9oz Filter Diameter: 58mm Focal Length: 50mm Aperture: F1.1 to F16 Frame: Full Frame Anti Shake Function: No anti shake function Refractive Index: above 1.9 Nearest Focusing Distance: 0.5m/1.6ft Lens Structure: 6 groups and 7 pieces Aperture Blades Number: 11 Focus Mode: Manual focus, auto focus (for A7II A7RII with adapter ring only) Lens Mount Type: for M mount. Package List: 1 x Prime Lens1 x Front Lens Cap (Installed)1 x Rear Lens Cap (Installed)1 x Cleaning Cloth