The Cine AF Pro Controller enables you to add precise manual focus control to your Cine AF lenses. The Pro Controller easily attaches to the front of any Cine AF lens with a unique front bayonet mount, giving filmmakers and videographers total control over focus. The Pro Controller features a dual scale with both feet and meters, and fine focus adjustments can be made with a smooth 300 rotation. The focus ring has an industry standard 0.8 MOD and can be combined with any follow focus. When the Pro Controller is attached, the focus ring on the lens can be used as an aperture ring. A tally lamp on the front lets the subject or photographer know if the camera is in a recording or in standby state. The front of the Pro Controller is compatible with 95mm matte boxes. The Cine AF Pro Controller from Rokinon enables you to add both precise focus control and detailed aperture adjustments to Rokinon/Samyang Cine VAF lenses. Designed for precise, cinestyle focus pulls, the controller enables hard focus stops and provides marks in both feet and meters. This frontmounted component features an easy, twiston design with a front that is compatible with matte boxes with a 95mm opening or clamp. Features. For Rokinon/Samyang Cine VAF Lenses. Enables Precise Focus with Hard Stops. Enables Detailed Aperture Control. Focus Marks in Feet and Meters. 95 mm Front DiameterSpecifications. Compatibility Rokinon Cine V AF Lenses Samyang Cine V AF Lenses. Mounting 1x TwistOn. Color Black. Weight 2 lbs