Light filtration.
Different lighting conditions demand varying degrees of light
filtration. The European Light Filtration Standard (EN 1836:1977)
divides lenses into 5 categories of filtration (FC0-FC4) based on the
percentage of visual light transmitted through the lens. Numa lenses
fall into categories FC0-FC3. Refer to the Light Filtration Chart below
to see which of our lenses are right for your intended usage.Neither
light filtration level nor tint affect the level of UV protection. All
Numa Tactical lenses, including Clear, provide 100% protection from all
UV light.
Light Filtration Chart
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