- Electronic aperture, internal focus, constant lens length
- Dust-proof and moisture-proof
- Optical construction of 15 elements in 11 groups, including 3 ed lenses and 8 lenses with high refractive index and 1 ultra precision aspherical lens
50mm focal length, F1.4 large aperture Optical construction of 15 elements in 11 groups, including 3 ED lenses and 8 lenses with high refractive index and 1 Ultra Precision Aspherical Lens HD Nano multilayer coating with water-resistant and antifouling coating Electronic aperture, internal focus, constant lens length Noiseless VCM focus motor Precision metal structure Dust-proof and moisture-proof