Sliding screw-knob style quick-release clamp
The Sliding Screw-knob Clamp with 60mm jaws, features dual mounting surfaces on either side of the clamp. The B2-Duo allows two Really Right Stuff compatible plates or rails to be positioned and affixed in a parallel orientation with one atop the other. The B2-Duo is the ideal clamp solution for mounting a RRS lens or camera body plate atop of a Multi-Purpose Rail or Camera Bar.
Two nylon thumb screws provide a secondary clamping option independent of the main locking knob in order to hold the B2-Duo clamp fixed to one rail, while moving or adjusting the second rail. This feature is ideal when mounting a telephoto lens plate atop a RRS camera bar as the user is able to fix the B2-Duo to the bottom of the lens foot, yet still slide the clamp along the camera bar for best positioning.
Because both clamping jaws are simultaneously adjusted by the main locking knob, all quick-release plates used with the B2-Duo need to be the exact same external dimensions. For this reason, the B2-Duo is only compatible with RRS brand or Wimberly brand quick-release plates. Mixing plates from other manufacturers might cause clamping fitment issues.