The tripod mount ring is constructed from high-density aviation aluminum, precision-machined using a high-end CNC turning center and hollowed out with diamond-coated cutter heads. It features vibration polishing technology, which enhances grinding precision by 20% compared to manual methods, and undergoes multiple anodizing processes to improve surface finish and color uniformity. Laser scanning technology accurately captures lens dimensions, enabling precise carving of the inner diameter of the lens collar. Designed specifically for the Nikon PC NIKKOR 19mm f/4E ED Tilt-Shift Lens, the mount avoids interference with commonly used switches and knobs, preserving full lens functionality. The tripod ring mounts at the front of the lens and does not rotate. This product is not compatible with other lenses. The lens support utilizes 3D engraving technology and features a unique bump design that secures the lens via the convex and concave edges. It has a split structure with a 180-degree quick-lock knob—simply align the lens with the mounting surface and rotate half a turn to lock securely. The unit weighs approximately 160g. The minimum inner diameter of the lens holder is approximately 74mm. The contact surface includes a 0.3mm-thick protective film. The quick-release plate measures about 50mm in length and includes 1/4-inch and 3/8-inch threaded screw holes, along with stainless steel anti-slip pins.