Features:

The tripod mount ring is tailor-made for Canon EF-EOS R adapter ring, CAN only be used for EF-EOS R basic models, not for models with filters or focusing rings. Relying on the switch and bayonet positioning, it cannot rotate in the tripod ring; when shooting vertically, the EF-EOS R adapter ring needs to be taken out and reinstalled
The edges and corners are polished; the inner wall is affixed with 3M plastic film, preventing the lens from scratches; the shortest inner diameter of the lens holder is about 73mm, the width of this contact surface is about 18mm; net weight is about 145g
The tripod collar bottom is added 55mm long Arca fit quick release plate feature, can be used with 39mm Arca-swiss fit tripod ball head, panoramic head and clamp; The tripod also reserved 1/4" and 3/8" screw holes and stainless-steel anti-slip screws for fixing the lens to the tripod directly
This lens support bottom's dovetail groove is 39mm Arca-Swiss 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
The tripod ring comprised Aviation Aluminum, CNC precisely machined, hollow-out weight reduction design, polished and surface anodized. As a result, the appearance and exquisite craft are much better than similar products made by mould

Compatible with:

Canon EF-EOS R Mount Converter Lens Adapter Ring
NOTE: You can only use it for EF-EOS R Basic Models, Not for Models with Filters or Focusing Rings and can not be used for other lenses

Package Content:

iShoot Tripod Mount Ring IS-EOS-R-PRO Lens collar support x 1
(The other items in the photos not listed here are for illustrating only, not included)

iShoot EOS R-PRO Tripod Mount Ring Lens Collar for Canon EF-EOS R Mount Adapter