Tripod Mount Ring Base + Camera Quick Release Plate for Canon Long Lens Collar
Tripod Mount Base IS-THC856 + Quick Release Plate QS-120. 1 x Lens Tripod Mount Base IS-THC856 for Canon Lens. Suitable for Canon EF 300/2.8, 400/2.8, 600/4, 800/5.6 Lens. Canon EF 300mm f/2.8L IS II USM.