iShoot Improved CNC Machined 80mm Lens Collar Tripod Mount Ring for Canon EF 28-300mm f/3.5-5.6L IS USM & Canon EF 70-300mm f/4-5.6L IS USM Lens, Built-in ARCA-SWISS Fit Quick Release Plate

The tripod mount ring is specially made for Canon EF 28-300mm f/3.5-5.6L IS USM lens and Canon EF 70-300mm f/4-5.6L IS USM lens; The lens collar is referencing to and modified from Canon original standard design, bearing is enhanced, details are improved, and added the features of quick release plate, more practical; The lens support is made of aviation aluminum, CNC precisely machined, surface anodic oxidation. Split structure, built-in anti-skid patch, copper knob and stainless steel anti-skid nails; net weight is about 165g, width is about 18mm, inner diameter is about 80mm; The lens bracket bottom is added quick release plate feature, plate length is about 76mm, with 1/4 and 3/8 screw holes and stainless-steel anti-slip screw; The lens holder bottom is 39mm Arca-Swiss fit quick release plate, compatible with ARCA-SWISS / RRS / KIRK / WIMBERLEY / MARKINS / SUNWAYFOTO / KANGRINPOCHE / BENRO / SIRUI / MARSACE / ISHOOT tripod ball head of Arca 39mm fit; suitable for iShoot IS-JZ30 / IS-JZ50 / IS-JZ64 / IS-QJ58 / IS-QJ64 / IS-QJ64-FD / IS-JZ60BK / IS-JZ70MFT / IS-JZ80BK clamp.