The Multi-Purpose Rail with an Integral Clamp (MPR-CL II) is our second-generation "standard" nodal slide rail with integral clamp. At 7.4" (189mm) long, the MPR-CL II provides no-parallax point positioning for non-collared lenses from 16mm and up on a full frame (35mm) camera. The built-in screw-knob style clamp allows mounting a camera body fitted with any Really Right Stuff camera base plate or L-Plate, with center reference marks for precise alignment. A built-in spirit level at the front end provides high-visibility leveling indication. A laser-engraved scale on either side allows for precise positioning relative to the reference mark in the clamp below.
The MPR-CL II can also be very useful as a mounting rail for our orbital style flash brackets
(B-Series/FR-Series) when using non-collared lenses. The rail clamps to the camera plate, and extends forward below the lens where the flash bracket can slide onto the top dovetail and have a variety of available positions.
For those using their DSLR cameras for video shooting, the MPR-CL II (combined with a RRS conventional or L-Plate) makes the perfect balancing rail atop our FH-350 Fluid Head