INNOVATIVE VARIABLE MOUNT WITH NEW LOCKING SYSTEM: The RevoRing Mark Ⅱ Variable ND filter features an innovative locking machinism, designed with precision to securely lock the Variable ND filter&CPL in place. RevoRing MK Ⅱ variable ND filter ensures greater stability and ease of use, providing ultimate control during your shooting experience | MORE STABLE AND SECURE MOUNTING: The variable mount is engineered to be fixed and stable, reducing the risk of RevoRing MK Ⅱ variable ND filter&CPL falling off. RevoRing MK Ⅱ variable ND filter holds your filters firmly, even under heavy usage, offering peace of mind for professional photographers and videographers | INDEPENDENT FUNCTIONALITY: The new locking system allows independent locking for both Variable ND and CPL filters, preventing unwanted shifts. This feature ensures each filter(ND filter, cpl or variable adpter ring) stays precisely in place, maintaining image quality without adjustments mid-shoot | EXPANDABLE COMPATIBILITY: The RevoRing MK Ⅱ variable ND filter&CPL is fully compatible with the SWIFT system and K-series square filters. This versatility allows users to expand their filter options easily, adapting to different creative needs and enhancing workflow efficiency | MAGNETIC COMPATIBILITY WITH REVORING MAGNETIC CLIP-ON FILTERS: RevoRing MKⅡ variable ND filter&CPL is also compatible with the RevoRing magnetic clip-on filtes, offering quick and secure attachment. With magnetic ease, you can effortlessly swap filters, saving time and reducing setup complexity in dynamic shooting environments | VND CONVERTER NOT INCLUDED