Really Right Stuff Macro 150 Single-Axis Focusing Rail with Integrated Arca-Type Clamp

The Macro 150 from Really Right Stuff is designed to provide fine-focus adjustment for precise macro compositions. It simplifies focus stacking thanks to an integrated zeroing dial and a lead screw with a 1mm pitch. One revolution of the dial equals exactly 1mm of travel. Backlash and drift are virtually eliminated due to tight-tolerance CNC-machined components. And there is no need to adjust the stage tension, as it is individually set during assembly. The load capacity is rated to 20 lb.