The B2-Duo is equipped with two nylon thumb screws, offering an independent clamping option separate from the main locking knob. This feature is especially useful when mounting a telephoto lens plate on a Really Right Stuff camera bar, as it allows the user to fix the B2-Duo to the lens foot while still being able to slide the clamp along the camera bar for optimal positioning.
The B2-Duo's versatile design is primarily intended for use with our Multi-Purpose Rails and Camera Bars. Its simple, low-profile design allows a collared lens or camera to be fixed in the top half of the clamp, while still enabling the B2-Duo to slide fore-aft (lens) or side-to-side (camera) on our Multi-Purpose Rail or Camera Bar. This makes it an affordable focus rail/nodal point slide for collared lenses or a sliding stereo photography setup.
Laser-engraved index marks on all four sides in the standard RRS zero, 12, and 18mm-on-center increments provide precision and ease of use. The two non-marring nylon thumb screws securely lock in place whatever is mounted on that side of the clamp. The B2-Duo can then be loosened using the main screw-lock knob to allow it to slide fore/aft or side-to-side on the Multi-Purpose Rail or Camera Bar.
Please note that the B2-Duo clamp is only compatible with Really Right Stuff or Wimberly brand quick-release plates. Due to the simultaneous adjustment of both clamping jaws by the main locking knob, all quick-release plates used with the B2-Duo need to have the exact same external dimensions. Mixing plates from other manufacturers might cause clamping fitment issues. The B2-Duo clamp should only be used with plates & rails from the same manufacturer.


