B2-40 LR Arca Quick-Release Lever Clamp: 50mm

Really Right Stuff's quick-release system is a beacon of industry reliability. Based on the trusted Arca-Swiss standard, this system comprises two essential components: the quick-release clamp and plate. Both pieces are indispensable, with the clamp permanently affixed to your tripod head or accessory and the plate remaining on your camera or lens at all times.

Traditional screwing methods, such as the standard 1/4"-20 screw, are not only tedious but also pose security risks. Once attached, the camera or lens is prone to rotation, jeopardizing the stability of your setup and potentially compromising your shots.

The RSS 50mm Release Clamp jaws open and close effortlessly, offering two convenient methods: a knurled knob for precise adjustment or a patented lever for swift, one-handed operation. The latter, featuring a Stainless Steel S-shaped cam-locking lever, stands out for its superior functionality compared to traditional screw knobs.

But compatibility is critical, and Really Right Stuff's quick-release system delivers. The clamp boasts a non-threaded center socket with a countersink, allowing the mounting screw to drop through from above into a tapped female socket. While it seamlessly integrates with Really Right Stuff ball heads and many Arca-Swiss models, compatibility checks are essential for newer Arca Swiss and some Manfrotto heads.

Avoid damage by using the correct thread screw with your Really Right Stuff products. Our ball heads use a 1/4-20 screw, while other brands may employ an M6 screw. For compatibility assistance, contact our customer service at (385) 248-0777 or toll-free in the U.S. & Canada at (888) 777-5557.

As of 2020, all clamps feature an updated attachment style and will not sit flush with older ball heads. To resolve this, please refer to our Clamp Rosette Adapter.

Features

• Swiftly transitions from closed to fully open with a single action, facilitating easy top-loading of Arca-Swiss-compatible quick-release camera and lens plates, eliminating the hassle of lost shots during setup
• Easily discern the lever's status—locked, half-open, or fully open—providing immediate visual confirmation for enhanced operational efficiency
• Sleek design ensures that the lever neither protrudes above nor below the clamp and snugly conforms to its contours when closed, minimizing snagging in the field and reducing the risk of damage from falls
• Smooth contours are gentler on the hands than knurled knobs, the graceful lever effortlessly opens and closes with finger force, eliminating twisting and ensuring comfortable handling for users
• Crafted from stainless steel for longevity and operates on a self-lubricating, wear-resistant bronze bearing surface. With a holding power of 50 lbs. under full compression, it guarantees reliable performance with our plates in any photographic scenario
• Laser-engraved markings ensure precise and repeatable plate alignment, facilitating seamless adjustments and enhancing overall accuracy during setup