The Blackmagic Focus Demand is a high-end focusing tool that is specifically compatible with Blackmagic Studio Cameras. When attached to either the Blackmagic Studio 4K Pro or 4K Plus, this tactile focus wheel affords fast, accurate, and smooth focus control. By mimicking a true broadcast lens, you are able to control focus directly from the tripod handles opposed to the lens itself. By doing so, your framing remains stable and small adjustments can be made to the focus throughout the production. The Focus Demand consists of a three-pronged focus wheel, which guarantees super smooth focus adjustments. In addition to this, the knurled texturing ensures a secure grip for pin-point focus manipulation.