＜Quoted from the DJI website＞ The DJI Ronin 3D Focus System automatically detects the distance between the lens and the subject, enabling the center AF frame of manual focus lenses to maintain focused shooting. A DJI Ronin Focus Motor is required to use this feature. The maximum detection range of the DJI Ronin 3D Focus System varies depending on the reflectivity of the subject. The maximum range is approximately 6 meters when shooting people. ━━━━━━ Please refrain from negotiating prices in the comments, as it is troublesome. If you have a desired price, please enter the amount using the "Price Reduction Request" button. The price will be lowered if the item doesn't sell, so please add it to your favorites to receive notifications. ━━━━━━ Purchased in December 2021. I believe it is in good condition, but please refrain from purchasing if you are overly concerned about minor imperfections, as it is a used item. Returns/refunds are not accepted except for initial defects (within 3 days).