K&F Concept Nano-C Series 4 to 8-Point Variable Star Filter 49mm (KF01.2326)

The K&F Concept Nano-C Variable Star Filter 49mm turns every bright point of light into a starburst: street lamps, candles, sun through leaves, stage lighting. Rotating the front ring moves it continuously from 4 points to 8 points, so you choose the look while you watch it.

Because the flare is etched into the glass you keep it at any aperture, unlike the natural starbursts that only appear when you stop a lens right down and lose light in the process.

The glass carries an 18-layer green coating to hold back ghosting around those same bright sources, and the slim frame threads onto compact primes such as 50mm f/1.8.