1.The tripod mount ring is made of high-density aviation aluminum; precisely machined by world-class high-end CNC turning center and hollowed-out carved by diamond combined cutter heads; adopting vibration polishing technology, which improves grinding precision by 20% than manual; multiple anodized, which improves the fineness and uniformity of the color of the metal surface by 10%; 2.Laser scanning technology is used to accurately obtain the lens parameters, and then the shape of the inner diameter of the lens collar is accurately carved based on the data; designed for Nikon PC NIKKOR 19mm f/4E ED Tilt-Shift Lens, avoiding the position of commonly used switch and knob, not affecting the main function of the lens; the tripod ring is installed at the front of the lens and cannot be rotated. This lens collar is not suitable for other lenses; 3.The lens support adopts 3D engraving technology. It relies on the edge of the concave and convex part of the lens to fix itself by its ingenious bump design. It adopts a split structure and a 180-degree quick-lock knob; as long as the lens snaps into with the concave and convex surface of the tripod ring, it can be locked firmly by rotating for half a circle; the net weight is about 160g; 4.The shortest inner diameter of the lens holder is about 74mm, and the bearing surface ing the lens is affixed with 0.3mm thick 3M plastic film; the quick release plate is about 50mm long, with 1/4 and 3/8 screw holes and stainless steel non-slip nails;