K&F Square Filter System Pro 7-In-1 Suit 100x100 kit(SKU1877A)

Key Features.
The K&F Concept Pro Square Filter System won the iF Design Award and the Red Dot Design Award.
Ultra-diameter ultra-thin: The bracket is 12mm thick and has a 91mm transparent opening. Effectively reduces the possibility of vignetting when using ultra-wide-angle lenses.
Easy to take out, no light leakage: Two square filters can be stacked in one holder, and the CPL will rise when the filter holder cover is lifted.
Everything you need to get started, including a 95mm CPL and a set of 4 adapter rings 67, 72, 77,82mm diameter.
Nano-coating: ND8 (3rd grade), ND64 (6th grade) and ND1000 (10th grade) 28-layer nano-coated optical glass.