R2 Filter Rings 143mm.
Fits in filter stages with ø 143mm back.
Like most Filter Stages for MB-18, MB-19, MB-20 and MB-29.
Filter Rings 138.mm do take Round Filters in the back with a diameter of 138mm.
Part No: K2.52204.0
R2 138mm Filter Ring ø 114mm
The ARRI 138mm Filter Ring ø 114mm is compatible with Master Prime Lenses, UP 14mm, UP 180mm, LDS-UP 14mm and LDS-UP 180mm.
Part No: K2.47190.0
R2 138mm Filter Ring ø 114mm wide-angle
Internal focus lenses only - Compatible with Master Prime Lenses, LWZ Alura, UP 14mm, UP 180mm, LDS-UP 14mm and LDS-UP 180mm; also compatible with wide-angle video lenses.
Not compatible with external focus lenses.