iShoot Tripod Mount Ring, 74mm All-Metal Lens Collar Stand Compatible with Tamron 70-210mm f/4 Di VC USD A034 (of Nikon F and Canon EF Mount), Built-in Arca-Swiss Quick Release Plate

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%; split structure design, accurate alignment of installation slot, net weight is about 155g; 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; the lens collar can tightly fit to the lens; the inner diameter is about 74mm, and the installation mark is laser engraved, which is clear and easy to identify; The 3M plastic film inside the ring reduces the surface wear of the lens. There are detachable non-slip screws and 1/4 and 3/8 screw holes at bottom, the scope of application is wider; Bottom is added 70mm length quick release plate of AS standard, compatible with RRS / ARCA-SWISS / PMG / WIMBERLEY / MARKINS / PHOTOCLAM / SUNWAYFOTO / BENRO / SIRUI / MARSACE / ISHOOT ball head of Arca 39mm fit, suitable for iShoot IS-JZ30 / IS-JZ50 / IS-JZ64 / IS-QJ58 / IS-QJ64-FD / IS-JZ60BK / IS-JZ70MFT / IS-JZ80BK.