Easy-to-access aperture switch enabling clicked and de-clicked operation. When switched to OFF, the stepless aperture mode quietly facilitates smooth depth-of-field transitions during video shooting.Built-in AF/MF switch for quickly alternating between autofocus and manual focus modes.Fn1 and Fn2 custom buttons allow for rapid access to key functions with select Sony cameras.Sophisticated LCD screen displays important shooting information including object distance, Fn icons, and aperture identification.An all-metal body and brass bayonet mount for a professional and reliable connection to Sony E-mount camera bodies.Dust-proof and water-resistant design for use in adverse weather conditions.USB-C interface for firmware upgrades.Compatible with 77mm filters for optional widely available landscape filters..