• Features a luxurious 19 lens configuration in 15 groups including 1 SLD glass, 3 FLD glass and 4 aspherical lenses. This combines advanced aberration correction with F1.4 brightness • The AF actuator uses a linear motor HLA (High-response Linear Actuator) for high-speed, silent, and high-precision autofocus • Rear filter holder can be attached to the lens mount as standard It also has a locking mechanism to prevent the filter from falling out • Sony E-Mount