NiSi Cinema 6.6x6.6 Pure Clear Lens Protective Filter

The NiSi Cinema 6.6x6.6" Pure Clear Filter is designed for one purpose: protecting your cinema lenses without compromising the image passing through them. Built from optical glass at a standard 4mm thickness, it slots into professional matte boxes that accept 6.6x6.6-inch filters — a common size across cinema rigs. Whether you are shooting on location with blowing dust and debris or working in a studio environment where accidental contact is a risk, this filter acts as an affordable insurance policy for front elements that can cost thousands to repair or replace.

NiSi chose an un-coated design for this filter, which means it introduces no color shift or tonal alteration to the image. This makes it a truly transparent protective layer that can remain on the lens throughout a shoot without any creative compromise. Cinematographers and camera assistants often keep a clear protective filter in the matte box as standard practice, and the NiSi Pure Clear fills that role with reliable optical quality. Its simplicity is its strength — it does exactly what it needs to do and nothing more.