Variable Neutral Density Filter

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Product model table

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Material BK7
Design Wavelength 400-700nm
Dimension Tolerance +0.0/-0.2mm
Thickness Tolerance ±0.2mm
Surface Quality 60/40 scratch and dig
Clear Aperture >90%
Flatness <2λ@632.8nm
Parallelism <3 arc minutes
Coating Metallic reflective coating
Coating Area 0-270°
OD Tolerance ±5% of OD Extremes
Wavelength 400-700nm