======= Features: =======
High quality aviation aluminum.
Precise CNC machining.
Black frosted surface.
Copper screw plated with black nickel.
Withstand extreme temperature.
Compatible with 150mm square filters (2mm Thickness).
Allow up to 3 filters to be used together.
Design for use on super wide angle lenses, specifically the Zeiss 15mm f/2.8
No black corners or vignetting.