Blackmagic Design Mounts | Blackmagic Design Ursa Mini B4 Lens Mount

Mount B4 Lenses On Your Ursa Mini With This B4 Lens Mount From Blackmagic Design. This Lens Mount Replaces The Existing Pl Mount On Your Ursa Mini And Features Corrective Optics, Which Counteract Spherical Aberration Inherent In B4 Lens Designs (To Compensate For The Trichroic Prism In 3-Chip Cameras). In Addition, This Mount’S Optics Expand The Image Circle Of The Attached Lens To Cover A Central Image Portion Of The Sensor, Enough To Provide A Full Hd Image.