The SW150 Mark II filter holder solves the issue of vignetting on larger wide-angle lenses and attaches via a specially designed lens adaptor (sold separately).
The SW150 Mark II comes with two filter slots, enabling the use of neutral density graduated filters alongside other types of filters.
The holder includes a Lightshield to prevent back reflections and create a light-tight seal, essential for using filters like the Little and Big Stopper.
The design of the SW150 Mark II has been developed from its predecessor compatible with a wider range of lenses (requires separate adapter ring), including the SW150 polariser and SW150 Little and Big Stoppers.