Blackmagic URSA Mini Pro B4 Mount

The URSA Mini Pro B4 Mount is an interchangeable lens mount that lets the camera work with the 2/3-inch B4 broadcast lenses many facilities already own. Because those lenses were designed for three-sensor prism-block cameras, the mount carries precision relay optics with spherical aberration correction that reshape the image for the URSA Mini Pro's single large sensor, so B4 glass resolves cleanly at up to 1920 x 1080 HD.

The mount swaps on in place of the standard EF or PL mount and pairs with the camera's built-in lens control, keeping servo zoom, focus and iris live on set. It is a light 12 oz addition and includes a shim kit for setting precise flange distance during installation. It carries Blackmagic part number BMD-CINEURSAMUPROTB4HD.