Star filters are one of must haves for both digital and film photography. Why? Because bright source of light is portrayed by flairs, rays universally across cultures (remember how children draw a sun?). At the same time on a photo, or even on a slide, a bright source of light is just a white spot. Star filters are used to translate brightness of the sun, blinks of light on the water, reflections, etc. into a culturally readable image. A Star filter is a must. Period. Most professionals have star filters, not UV filters, permanently mounted on their photo and video equipment.