CNC Lens Collar Tripod Mount Ring Compatible with Tamron 18-400mm f/3.5-6.3 Di II VC HLD B028 (EF/F Mount), Lens Support Holder Bracket Bottom is Arca-Swiss Fit Quick Release Plate

1. The lens collar is tailor-made and compatible with 18-400mm f/3.5-6.3 Di II VC HLD B028 lens (for EF-mount, F-mount), cannot be used for other lenses; reserved window for the LOCK switch on the lens, other switches are blocked; The lens collar is fixed by the switch and cannot be rotated. 2. The net weight of the tripod mount ring is approx. 155g, carved into an irregular shape, the smallest diameter is approx. 76 mm, the contact surface with the lens is made of 3M plastic film, the widest is approx. 18 mm, and is locked by the large non-slip button. 3. The tripod collar bottom has a 55mm long Arca fit quick release plate, can be used with 39mm Arca-swiss Fit tripod ball head, panoramic head and clamp directly; more convenient than lens collar without dovetail groove. 4. The bottom lens support reserves 1/4" and 3/8" screw holes and a non slip stainless steel screw to directly attach the lens to the tripod. 5. The tripod ring is made of aviation aluminum, CNC precision machined, hollowed weight reduction design, polished and surface anodized. The appearance and exquisite workmanship are much better than similar products made of mould.