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 |
| FNP2050 pdf | 2 | 1 | 50 | 50 | 0.1 | Wratten 2 | ND No. 96 Filter |
US$51.92
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| FNP3050 pdf | 3 | 0.1 | 50 | 50 | 0.1 | Wratten 2 | ND No. 96 Filter |
US$51.92
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| FNP1050 pdf | 1 | 10 | 50 | 50 | 0.1 | Wratten 2 | ND No. 96 Filter |
US$51.92
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| FNU3050 pdf | 50 | 50 | 2 | UV Fused Silica | Metallic ND Filter |
US$103.21
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| FNU3025 pdf | 25 | 2 | UV Fused Silica | Metallic ND Filter |
US$64.98
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| FNU2050 pdf | 50 | 50 | 2 | UV Fused Silica | Metallic ND Filter |
US$103.21
|
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| FNU2025 pdf | 25 | 2 | UV Fused Silica | Metallic ND Filter |
US$64.98
|
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| FNU1550 pdf | 50 | 50 | 2 | UV Fused Silica | Metallic ND Filter |
US$103.21
|
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| FNU1525 pdf | 25 | 2 | UV Fused Silica | Metallic ND Filter |
US$64.98
|
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| FNU1050 pdf | 50 | 50 | 2 | UV Fused Silica | Metallic ND Filter |
US$103.21
|
