Tiffen Streak Set
4×5.65 square filters comes in softcases.
The streak effect is produced by a series of thin lines etched into the flat optical surface of a clear filter. The size and brightness of the star lines produced are a function of the size, shape, and brightness of the light source.
Set comes with 1mm, 2mm, and 3mm line spacing filters
Available individually for $15/day each.