The most popular artistic filter to create dramatic 4-cross flare effect. The HOYA STAR 4X filter creates a 4-beam flare on light spots and is effective when shooting night illuminations, reflections on water surfaces, light leaking through leaves, photographs of jewelry and other scenes with tiny light sources. Star filters are dramatic multi-point light flares or rays of light, also known as star effect, that bring bright or strong point light sources into scene. STAR 4X, which have 4 light beams respectively emanating from the light source. HOYA star filters have lines etched into the surface of the high-quality optical glass of the filter in order to create the star effect. Each of the filters, STAR 4X have different patterns of lines etched into the glass to create the number of rays of light for the filter. Some Practical TipsStar filter gives a beautiful and romantic effect, emanating multiple rays of light coming out from a point source of light, or a bright object in the image. The ray's appearance may differ depending on aperture setting, size, strength of the light source and the distance to the camera. Find the best angle of the star effect according to your personal intentions of the composition by rotating the filter frame. When shooting a video, rotate the frame to achieve dynamic and rhythmical movements of the beam flares.