Lens Collar Support IS-THRF680PRO Me for RF 600mm 800mm F11 IS for STM Telephoto Lenses

Replacement metal tripod mount ring / base foot engineered for RF 600mm F11 IS for STM and RF 800mm F11 IS for STM telephoto lenses, providing reliable support for vertical (portrait) shooting. The unit features two bottom quick-release plates, both made to RRS / ARCA-SWISS standard (AS 39mm). One end of the base plate locks with spring screws and includes both 1/4" and 3/8" threaded holes; the opposite floating plate offers reserved 1/4" screw holes. Constructed from aviation-grade aluminum with CNC precision machining, a hollowed weight-reduction profile, polishing and anodized surface treatment for a refined appearance and durable finish. Quick release plate conforms to AS 39mm standard and is compatible with RRS / ARCA-SWISS / KIRK / WIMBERLEY / MARKINS / SUNWAYFOTO / KANGRINPOCHE / BENRO / MARSACE / ISHOOT ball heads designed for Arca 39mm fit.