https://www.novoflex.de/en/products-637/macro/extension-bellows/universal-bellows-balpro-1/castel-q.html
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 repro stand.
The CASTEL-Q comes with Arca size dovetail clamping and was designed to fit the NOVOFLEX Q=BASE II and Q=MOUNT quick-release units.
It can also be mounted on any tripod head with 1/4”-20 or 3/8”-16 thread.
If finer settings of the slider are desired, e.g. for Focus Stacking, the Fine-adjustment handle CAST-FINE is available.
A second focusing rack converts the CASTEL-Q to a cross focusing rack of exceptional stability (see CASTEL CROSS).
Technical specifications:
Dimensions: 200 × 100 × 33 mm (7.9 × 3.9 × 1.3”)
Glider width: 66 mm (2.6”)
Weight: 412 g (0.9 lb.)
Travel: 125 mm (4.9”)
Tripod connection: 3x 1/4"-20 - 3/8"-16 thread pairs and NOVOFLEX Q profile (ARCA-UniQ/C compatible)
Camera connection: NOVOFLEX Q-profile (ARCA-UniQ/C-compatible)
Adjustment range with a complete rotation of the drive wheel: 15mm (0.6")
Camera connector pieces (Q=Plates) not included.
For compatible plates click here