The Extra Non-Rotatable Filter Stage makes it possible to use an additional 6.6x6.6 filter. It attaches to the Basic Module by sliding to the rear and fixed by two thumb screws without using any tools. For extreme lightweight applications such as gimbal and Steadicam the separate single filter stage works perfectly in conjunction with any clamp, or the tilt and flex adapter. Each filter frame is secured with an extra tray catcher which holds the filters in place perfectly. The LMB 6x6 sunshade can be mounted directly to the front of the filter stage.