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.A second focusing rack converts the CASTEL-Q to a cross focusing rack of exceptional stability (see CASTEL CROSS).Glider width: 66 mm (2.6”)Travel: 125 mm (4.9”)