The CASTEL-CROSS-Q consists of two CASTEL-Q focusing racks combined to give 140mm of geared movement on two axes. Each 200mm long rack is formed from a solid aluminium extrusion, and uses rack-and-pinion gearing to give precise control, free from any backlash. Once precise focus has been achieved, the platform can be locked in position. A 40mm Q-PL1 plate with 1/4" screw is included, and the clamp will accept most other Arca-pattern camera plates. The base of each rack has 1/4" and 3/8" female threads for tripod/head mounting plus a profile to fit Novoflex Q and Arca-compatible quick releases. The racks can be separated for use individually.