The NiSi Enhanced Landscape NC CPL Filter for NiSi 100mm V5/V5 Pro/V6/C4 is an 86mm PRO C-PL that works exclusively with the NiSi 100mm V5/V5 Pro/V6/C4 Holders. The Enhanced Landscape version of the CPL improves saturation in landscape images compared with the included C-PL with the V5 kit and other 100mm kits. When used with the V5 Alpha the 82mm main adaptor ring is also required to mount the CPL.