busterboy wrote in post #2876460
I have indeed made a mistake here Dave, The tripod ring I have here fits the 70-200mm 2.8L IS. It also fits the 100-400mm zoom lens.
Sorry for the confusion Dave, My fault..
I need clarification on the model for the 70-200mm F.4L which still has me baffled..

No worries , I was fairly confident , just being diplomatic.
The Ring A(W) is also specified by Canon as the ring for the 70-200 F4.
It also fits the 200 2.8 prime , but if you like colour coordination the Ring A (B) is better for the 200 prime as it's black.
Unfortunately for me , my ring A(W) does not fit my 70-200 F4 very well. (it does not tighten completely) It tightens on the 200 prime and the 400 prime..