Used for mounting R1/R10/R20 directly onto a pole or monopod.
For mounting QR clamp of R1/R10 directly onto a pole with height of 3m or above.
For shifting the lens in front of the No Parallax Point by 5-20mm.
Features 35mm (1-3/8") diameter ring with 2 mounting screws.
Note: images show how this adapter can be applied.