- Electronic aperture, internal focus, constant lens length
- Hd nano multilayer coating with water-resistant and antifouling coating
- Optical construction of 15 elements in 12 groups, including 4 ed lenses and 3 aspheric lenses
16mm focal length, F1.8 large aperture Optical construction of 15 elements in 12 groups, including 4 ED lenses and 3 aspheric lenses HD Nano multilayer coating with water-resistant and antifouling coating Electronic aperture, internal focus, constant lens length Noiseless STM focus motor Precision metal structure Dust-proof