Meet Alter. It's a Rapid Filter System (RFS) that lets you engage and disengage lens filters the moment you need them. It attaches via the universal filter threads your lens has, and then you can screw a ND or CPL filter on to it (between 40.5mm and 105mm filter thread size). Yes, it still works with your lens caps but it will not work with lens hoods.
So how does Alter RFS work? Since it's attached to the filter threads on your lens, you simply lift the "window" out to expose the camera lens when you don't need to use the filter you have attached. This is great when you're going from indoors to outdoors. This also keeps your filters close to your lens at all times. The "window" is held in place with magnets so it will not flip open easily.
Features:
- Adjustable friction hinge
- 270 degree hinge rotation
- Zero light leak
- 360 degree hinge orientation
- Magnetically secured closed
- Milled aerospace aluminum with anodize
