The hoya 55mm star 6 filter is a cross screen filter that produces multi beam stars the cross screen filter has a surface which is etched with a fine grid pattern the pattern point light sources and reflections create the multi beam stars hoyas star 6 cross screen has been manufactured to ensure that a 6 point star is created from point light sources and reflections star 6 adds a dramatic 6 point flare to very bright areas giving a soft focus effect ideal for phot