Zeiwohndc IS-THRF680PRO Lens Collar Support Base for RF 600mm F/11 IS for STM & RF 800mm F/11 IS for STM

Replacement metal tripod mount ring/base foot designed for RF 600mm F/11 IS for STM and RF 800mm F/11 IS for STM telephoto lenses. Provides secure support for vertical shooting and stable tripod use. Constructed from aviation aluminum with CNC precision machining and a hollow weight reduction design; finished with polishing and surface anodizing treatment for durability and a refined appearance. The base features two bottom quick release plates, both manufactured to RRS/ARCA-SWISS standard. One end of the bottom plate is locked with spring screws and includes reserved 1/4 screw holes and 3/8 screw holes; the opposite floating plate is reserved with 1/4 screw holes. Quick release plate is AS 39mm standard and fits RRS / ARCA-SWISS / KIRK / WIMBERLEY / MARKINS / SUNWAYFOTO / KANGRINPOCHE / BENRO / MARSACE / ISHOOT ball head Arca 39mm fit.