iShoot Improved Lens Collar Tripod Mount Ring for Nikon RT-1 Nikkor AF-S 300mm F/4E PF ED VR & 70-200mm F/4G VR, Bottom Quick Release Plate Feature Compatible with Arca-Swiss 39mm Fit Ballhead

The lens support is tailor-made for Nikon AF-S NIKKOR 300mm f/4E PF ED VR Lens and Nikon AF-S NIKKOR 70-200mm f/4G ED VR Lens; The lens collar is made of aviation aluminum, CNC precision machining, surface anodized, light weight hollow out design, with stainless steel screw. Net weight is about 160g; Referencing to and modified from Nikon original standard design, structure is enhanced, details are improved, and add the function of quick release plate, more practical; The inner diameter of tripod mount ring is about 68mm, using embedded flocking to increase resistance; with three marks, convenient for lens rotation and alignment; fast spring lock, convenient for quick assembly and disassembly or adjust the composition of camera body; removable quick release plate, reserved 1/4" and 3/8 " screw holes; Quick release plate is AS 39mm standard, compatible with RRS / ARCA-SWISS / KIRK / WIMBERLEY / MARKINS / SUNWAYFOTO / KANGRINPOCHE / BENRO / SIRUI/MARSACE / ISHOOT ball head of Arca 39mm fit, suitable for iShoot IS-JZ30 / IS-JZ50 / IS-JZ64 / IS-QJ58 / IS-QJ64 / IS-JZ60BK / IS-JZ70MFT / IS-JZ80BK.