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Neutral Density Filter-Absorptive

Neutral Density Filter-Absorptive
Material Absorptive Glass
Diameter Tolerance +0.0/-0.2mm
Clear Aperture >90%
Surface Quality 80/50 scratch and dig
Flatness <2λ@632.8nm
Parallelism <5 arc min
Chamfer Protective<0.5mm×45°
OD Tolerance OD±10%