NiSi M75 67mm Main Ring with Rotating Mechanism Polariser
Replacement main ring with 67mm rear thread for NiSi M75. This ring is essential to use the NiSi Landscape Polariser (or NiSi Standard “PRO” polariser) on the NiSi M75 holder system. It is not compatible with other screw-in polarisers.
Using a spare rotating adaptor ring for the NiSi M75 Holder
Many photographers use a main ring for each lens, in order to keep one mounted on each lens and avoid taking it apart and moving it every time. If you use the main ring on a lens with 67mm thread, the ring and the Lens Cap for NiSi M75 are sufficient to protect the lens. If, on the other hand, you have a lens with a thread smaller than 67mm, you can add the corresponding adapter ring.