EasyFoto 39mm Silver/ Chrome Curved Vented Metal Lens hood for Leica, Contax Zeiss, Voigtlander Lens 39mm Chrome / Silver Metal Vented Lens Hood for Leica, Contax Zeiss, Voigtlander rangerfinder Lens Fits LEICA SUMMARON 35mm f/2.8, LEICA SUMMARON 35mm f/3.5, LEICA SUMMICRON 50mm f/2 and other lens which is with 39mm 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.