Features: Brand new and high quality 1. The lens collar is custom-made based on the lens structure, only for Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD B061 (X Mount and E Mount) lens; supports lens rotation and vertical shooting; 2. The bottom of the tripod collar is added with a 50mm long Arca fit quick release plate function, can be used with 39mm Arca-swiss fit tripod ball head, panoramic head, and clamp directly; more practical than lens collars without QR plate; 3. Reserved 1/4" and 3/8" screw holes and stainless steel anti-slip screws to attach the lens directly to the tripod; 4. The dovetail groove at the bottom of this lens support is 39mm Arca-Swiss standard, for RRS / ARCA-SWISS / ISHOOT tripod head clamp with Arca 39mm fit, suitable for iShoot IS-JZ30 / IS-JZ50 / IS-JZ64 / IS-QJ58 / IS-QJ64-FD / IS-JZ60BK / IS-JZ70MFT / IS-JZ80BK; 5. The lens collar IS-TA1830 can be combined with the clamp mount converter IS-3950PRO (sold separately), which can be used for fluid heads with Manfrotto structure; 6. The tripod ring is made of Aviation Aluminum, CNC precisely machined, hollow weight reduction design, polished and surface anodized finish, exquisite workmanship. Specifications: Item: Lens Collar Material: Aluminum Alloy Model: IS TA1830 Color: Black For: Tamron 18-300mm F3.5-6.3 Di III-A VC VXD B061 X/E Mount Tripod Mount Ring Note: (The other items in the pictures not listed here are for illustration only, not included) Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. The error in manual measurement of the size is within the normal range of 0-2 cm. Package includes: 1 x Lens tripod mount ring base IS-TA1830