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This B2-LR-II Lever-Release Clamp from Really Right Stuff is compatible with most Arca-type camera plates, camera bars, and multi-purpose rails. The jaws of the clamp open wide for plates to be top-loaded quickly and easily.
The locking lever-release is opened or closed by only using finger force, and once the clamp is locked down onto the plate, it has a holding power of up to 50 lb. At the top of the clamp it features three counter-sunk sockets. The center socket is non-threaded, and it accepts metric 6 and 1/4"-20 threaded screws to mount to a ball head stem. Two additional 1/4"-20 threaded holes are spaced 30mm apart from the center socket.
The CNC machined 6061-T6 aluminum clamp has a black anodized type II finish. Index marks are laser-engraved on both sides of the clamp so a position can be repeated reliably. The stainless steel locking-lever has a low profile, and the lever hugs the side of the clamp very closely, so it is very unlikely to snag onto clothing or something else in the field. The clamp has a built-in bullseye spirit level, which keeps your camera leveled in a horizontal plane.
Arca-type compatible clamp
Easy top-loading, low profile clamp
Stainless steel locking lever-release cam, which opens and closes with finger force
Clamp has up to 50 lb of holding power
CNC machined 6061-T6, type II black anodized aluminum
Laser-engraved scale for repeated positions and a bullseye spirit level to keep camera leveled
Top center socket is a non-threaded and counter-sunk hole, but accepts metric 6 and 1/4"-20 threaded screws to mount to a ball head stem
Center socket has a 3/8"-16 female thread on the bottom, and can screw onto a 3/8"-16 ball head stem
Two additional 1/4"-20 threaded holes are spaced 30mm apart from center socket
In the Box
Really Right Stuff B2-LR-II Lever-Release Clamp (60mm)