Unbranded Arca-compatible clamp brand_Cinestill and there are a few

and there are a few caveats with older Nikon digital cameras

The SMC Pentax-M 50mm f1

This lens is 6-bit coded for best performance with any modern Leica M-mount camera

5 feet (or about 1

It can also be used on a body

Unbranded Arca-compatible clamp brand_Cinestill and there are a fewThis is an unbranded, good quality, machined Arca compatible clamp. Single 3 8" threaded fitting with a 1 4" insert. The remarkably long knob might look silly, but the extra ~5cm may help the knob clear the baseplate of many larger cameras. Arca plate not included. Image is for illustrative purposes only. Actual item may differ slightly.