NiSi 77mm Adapter Ring for Swift System Filters Jupio Specials margin bottom: 3% margin bottom: 3% and with the incorporated lens elements of this lens it also helps the photographer to shoot handheld without the worry of getting distorted images as quality remains throughout its focal range The filter simply attaches to the adapter by pressing into the NiSi Adapter Ring for Swift System Filters which then screws onto the lens The NiSi Adapter Ring for Swift System Filters is designed to enable you to use a filter designed for the Swift System to be attached directly to the lens without the need for the NiSi True Color 1 5 Stop VND (Variable Neutral Density filter)