All Metal Wormdrive Macro Rail Fine Focus Focusing Arca / RRS Lever Clamp Compatible

Features: Helping to achieve exacting camera-to-subject distance, the Macro Focusing Rail is a focusing stage offering fine- tuned control across a 115mm adjustment range The Rail is driven by a knob-controlled worm gear and index scales, in millimeters, are printed on both sides of the rail for consistency.. Cameras can be mounted on top of the rail via the integrated 1/4"" screw, which uses a 48mm-diameter thumbwheel to secure cameras in place. 214mm overall length (including adjustment knob). Weight 293g (10.3oz).