Ultra-precision aspherical lenses offer soft and beautiful bokeh New modern design with matt finish and red ring Fast & quiet AF and well-controlled breathing for shooting video Focus Hold Button - Pressing this button on the lens will keep the lens locked to that focusing distance. You can assign functions such as Eye AF in settings on the camera body. Custom Switch - There is a custom switch, which can be set to allow adjustment of the aperture silently by rotating the focus ring. Using the optional Lens Station, you can set up the mode to suit your own preference.