iShoot Lens Collar Tripod Mount Ring Compatible with Sigma 28-45mm F1.8 DG DN Art, 28-105mm F2.8 Art & 24-70mm II L-Mount, Quick Release Plate Support Holder Arca-swiss Fit Clamp

1. The lens collar is designed based on the shape and structure of the lens, only compatible with Sigma 28-45mm F1.8 DG DN Art (L-Mount), 28-105mm F2.8 DG DN Art (L-Mount) & 24-70mm F2.8 DG DN II Art (L-Mount) lens; cannot be used with any other mount lens; 2. The lens collar adopts the overall one-time molding, double locking structure, and the locking knob is not removable; the large knob pushes the metal ring body, and the small knob pushes the plastic slider; The two knobs assist each other to lock the lens; 3. When installing, release the knob first, then align the position, gently snap in, lock it slowly, rotate both knobs alternately; the tripod ring cannot be rotated on the lens, and can only be shot horizontally, not vertically; 4. Due to the limitation of the lens mounting structure, the tripod ring does not support the installation of a camera cage or a vertical shoot quick release plate, and may touch each other; the tripod ring does not support rear-facing carry; 5. The tripod collar is added 50mm long 39mm Arca fit quick release plate, can be used with 39mm Arca-Swiss fit tripod head and clamp directly; more practical than lens collars without QR-Plate; reserved with 1/4" and 3/8" screw holes and QD hole, and stainless-steel anti-slip screws for fixing lens to tripod directly； The bottom of the plate is improved with new design, which is also compatible with the handheld stabilizer with the same structure of Arca-Swiss.