Description: Follow Focus with Lens Adapter Gear Ring Mount. Suitable for 52mm-86mm lens, match with camera rail rig, support system and so on. Accurately follow the lens focus to help photographers adjust the focus. Easy installation makes it easier make video recording more efficient. High quality aluminum alloy, shockproof design, better feeling. Specification: Material: Aluminum Alloy Follow Focus Size: 19x12 cm / 7.5x5.9 inch Package Includes: 1x Follow Focus 1x Lens Adapter Gear Ring