Hoya Cross Screen STAR-4 adds a dramatic four-cross flare to very bright areas, giving a soft-focus effect. It is ideal for photographs of ladies wearing jewelry or other objects with strong reflections. Hoya Cross Screen filters have a surface that is etched with a fine grid pattern. Depending on the pattern, point light sources and reflections create multi-beam stars. Hoya's Star-4 Cross Screen is designed so that a 4-point star is created from point light sources and reflections. The effect is produced by a series of thin lines etched into the flat optical surface of a clear filter.