Add some sparkle to your night shots, city skylines, street scenes, lamp posts, streetlights, car headlights, candle lights, and gaslights, any place there's sources of points of light.
 
Make the lights all come to life like magic with star filters. The sun reflecting off lake water can be an extremely interesting image. If you get up at dawn after an ice storm before the sun goes to work, everything is an interesting subject to capture. Holiday lights are wonderful with star filters

Star filters are the right tool to use in enhancing the natural sparkle effect in precious gemstone close-up work.