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.
| Name | Density @ 546nm | Transmission (%) @ 546nm | Diameter (mm) | Length (mm) | Width (mm) | Thickness (mm) | Material/Equivalent | Type | Price | Buy |
| FNU00325 pdf | 25 | 2 | UV Fused Silica | Uncoated UV Fused Silica |
US$34.75
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| FNP4050 pdf | 4 | 0.01 | 50 | 50 | 0.1 | Wratten 2 | ND No. 96 Filter |
US$59.49
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| FNP2799 | 1.1 | 27.2 | 2 | Absorptive Glass ND Filter |
US$32.80
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| FNP0950 pdf | 0.9 | 13 | 50 | 50 | 0.1 | Wratten 2 | ND No. 96 Filter |
US$59.49
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| FNP09300 pdf | 0.9 | 13 | 300 | 100 | 0.1 | Wratten 2 | ND No. 96 Filter |
US$516.11
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| FNP0850 pdf | 0.8 | 16 | 50 | 50 | 0.1 | Wratten 2 | ND No. 96 Filter |
US$59.49
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| FNP0750 pdf | 0.7 | 19 | 50 | 50 | 0.1 | Wratten 2 | ND No. 96 Filter |
US$59.49
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| FNP0650 pdf | 0.6 | 25 | 50 | 50 | 0.1 | Wratten 2 | ND No. 96 Filter |
US$59.49
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| FNP0550 pdf | 0.5 | 32 | 50 | 50 | 0.1 | Wratten 2 | ND No. 96 Filter |
US$59.49
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| FNP0450 pdf | 0.4 | 40 | 50 | 50 | 0.1 | Wratten 2 | ND No. 96 Filter |
US$59.49
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