NOVOFLEX focusing racks are indispensable accessories for macro and stereo photography. They can be mounted on any tripod and on the NOVOFLEX MS-REPRO macro reprostand. The CASTEL-Q comes with Arca size dovetail clamping and was designed to fit the NOVOFLEX Q=BASE quick-release system. It can also be mounted on any tripod head with 1/4 or 3/8 thread Or directly on the quick releases Q=BASE or Q=MOUNT.