I ordered this K&F CONCEPT 82mm Variable Short Line Star Lens Filter (6 Point), Cross Screen Starburst Filter-18 Layer Coating Optical Glass with 3 Cleaning Cloth (K Series) to use in specific and limited situations.

I own quite a few "special effects" filters and the impulse to overuse them can be almost overwhelming at times. I've discovered that careful and judicious use of these filters can add to a portfolio but overuse marks you as a total beginner.

There are times when I want to add a star pattern to a point source of light, and this filter from K&F Concept does well. The filter produces a 6-point star pattern with evenly spaced spikes. The length of the spikes is well-controlled so that they do not overwhelm the elements of your photo. The quality of the glass is good. The filter did not introduce flare, distortions, or softness to my images.

If you are looking for a star filter, this one from K&F is worth looking at. I always recommend that you purchase any filter in a size large enough to fit your largest diameter lens and use stepup rings to fit it to smaller diameter lenses. Larger filters cost more upfront but they will be a "buy one filter for all my lenses" situation.