The Monoball X-Table System from Arca-Swiss is a geared optical bench designed specifically for macro photography. It comprises two finely geared 8" rails mounted at right angles, in X and Y axes. The rails are etched with millimeter markings along their length to aid in proper focus. The rails run through two cross-mounted focusing carriers which allow for fine camera movement along their length. Both carriers feature a friction knob and an adjustment knob so you can position your camera with extreme accuracy. The top carrier has an Arca-Swiss MonoballFix quickset clamp on top with which to mount your camera. The clamp has an incorporated bullseye level to aid in alignment. The base monorail can be mounted directly into a quick release clamp without a quick release plate.