Photo Clam PC-C90-UP Lens Plate for Canon EF 70-200mm f/2.8L IS II Lens

I purchased this for my Canon RF 100-500mm f4.5-f7.1 L IS USM lens because I didn't need or like the bulk or cost of the Kirkland version. At first the fit is a bit loose, but snug up the screw, making sure the shoe is aligned on the foot and it holds nicely.

Like everyone else, for years I simply used a generic plate on the Canon lens foot for my Arca-Swiss tripod clamp. But they tended to loosen over time, slip, or worse yet, twist. Then of course I found a foot with an anti-twist lip at the back, so that helps, but I still had to add some protective gaffer tape to the Canon foot to keep it from getting scratched. With this Arca-Swiss custom fit lens plate, it fits perfectly (the machining is quite top-notch) and the profile is almost as low as the Canon foot by itself. And of course, there is absolutely no possibility of it twisting anymore. My only wish is that it would have a slot for attaching a strap. My older, clunkier generic one did, and I used a single Op/Tech USA quick disconnect male end there so I could attach a hand strap, longer shoulder strap.