EzFoto 40.5mm Tilted Vented Metal Lens Hood Shade for Leica, Contax Zeiss, Voigtlander Lens 40.5mm Tilted Vented Metal Lens Hood Shade for Leica, Contax Zeiss, Voigtlander Lens Fit other lens which is with 40.5mm filter thread Made of metal, leica style lens hood It can prevent unwanted stray light from entering the lens and ensure no problems with vignetting or motor functions. Added benefit of extra protection from accidental impact.