Rainbowimaging 37mm Vented Metal Hood Shade for Leica Leitz Zeiss Voigtlander Lens Metal lens shade for all standard lens with 37mm filter thread lenses, will screw into your lens, or filter. Solid metal construction, with flat black interior to prevent reflections. Protect the front barrel form the inevitable impacts against walls, door frames and other real-life obstacles. Prevent glare by stopping light from coming into the lens at side angles. and improves contrast and image quality. Protects lens from scratches and impacts.