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Neutral density filters attenuate light by a constant amount that is, to first order, independent of the wavelength neutral density filters are designed to equally reduce the transmission over a specified spectrum, either by absorption or reflection. Knight Optical stock several ranges for your specific application.
![Neutral Density Filters 1](https://www.knightoptical.com/stock/pub/media/catalog/category/nd_filter.jpg)
Neutral Density Filters
- Absorptive Glass Neutral Density Filters 47 items
- Gelatin Neutral Density Filters 14 items
- Metallic Neutral Density Filters 56 items