Tiffen 67mm 6pt/2mm Grid Star Effect Filter Flashes & On Camera Lighting They are 20mm long which

They are 20mm long which allows you use them socket to socket

2 frequency registers

Please take care it

18pF load capacitance

Tiffen 67mm 6pt/2mm Grid Star Effect Filter Flashes & On Camera Lighting They are 20mm long whichCreates a Streaking Pattern Use With Point Light Source Black Aluminum Filter Ring ColorCore Glass Made in the USA 10 Year Warranty The 67mm 6pt 2mm Star Filter from Tiffen creates multiple points of light, or "stars," streaking outward from a central light source. This filter comes in a rotating mount for critical placement of the star effect. Wedding photographers will especially appreciate the value of this filter. When it comes to special effects