Neewer Black Four Leaf Barn Door Barndoor for Photography Studio Flash Light Suitable for studio flash with reflector dish, mainly for professional portrait photography and product photography. Barndoors are an ideal accessory to enhance any photography setup as they provide a mechanism to alter the shape, intensity and color of flash and continuous lights. Attaching barndoors to light sources creates a beam spread of light that can be altered per the need of the photographer. The size of the beam can be modified by changing the opening between the flaps or the distance of the light source from the subject. The barn doors are on hinges at an angle of 180 degree foldable, outside is satin black.