The Progrey G-120X holder is designed in the same fashion as the G-100X and G-85X, using a variety of Progrey adapters and/or step-rings for attaching to your lenses. The G-120X includes the same components as the G-100X but accommodates 120mm wide flat filters. It includes a pair of single clips, a pair of double clips and a pair of triple clips for using up to 3 slide-in filters at a time.
The Progrey G-120X holder is ideal for use on extreme wide angle lenses, especially on full frame sensor cameras, as well as normal to telephoto focal lengths. Because of the extra wide diameter, there is less chance of vignetting when attached to extreme wide angle lenses - even when using the triple filter clips!
Adapters (sold separately) must be used to attach the G-120X to your lens. The G-120X uses either of 2 size adaptors: the CPL82-82mm (for attaching to a lens or step-ring thread size of 82mm and allowing a circular filter of 82mm diameter to be screwed into the front) and the CPL 82-77mm (for attaching to a lens or step-ring thread size of 77mm and allowing a circular filter of 82mm diameter to be screwed into the front).