Designed for use with NiSi Athena full-frame prime lenses in PL Mount, the Athena Rear PL Filters available include the Full Spectrum ND and Black Mist.
The Full Spectrum ND filters deliver full-spectrum neutrality for authentic, true-to-life outcomes. Every shot retains its original color fidelity and clarity, free from the common distortions or color shifts. Crafted from high-grade optical glass encased in a robust yet lightweight aluminum frame, it’s built to endure the rigors of the field while delivering impeccable cinematic quality.
Each filter includes a bespoke tool for swapping or adjusting the filter on the lens.
How do you use the tool? Here's a link to NiSi's instructional video.