This is a CPL filter for NISI Swift. A SWIFT adapter ring is required for individual purchase. The "SWIFT System" is a filter system developed for video shooting. The completely new filter mounting method, realized through precise processing technology and special materials, eliminates the need to screw in filters as with conventional methods, allowing them to be attached simply by pushing them in. The overlapping of the filter frames while maintaining airtightness provides both the holding power to prevent them from falling off even during run-and-gun shooting and smooth attachment and detachment.