The optional zoom and focus demands can be added to turn affordable photography lenses into amazing broadcast lenses! The focus and zoom demands have USB‑C connections so they work with all Blackmagic Studio Camera 4K models. Each zoom and focus demand has 2 USB‑C ports, so you can daisy chain them then connect to the camera with a single USB connection. The design has an incredibly precise feel and so you get very fine lens control, and you can frame and adjust the lens without taking your hands off the tripod handles. The buttons can be customized so you can assign different camera functions to them! Plus, hardware is included for mounting the focus and zoom demand onto tripod handles