Frequently Asked Questions

The features of the FNG3050 Absorptive Glass Neutral Density Filter include mounting of diameters and squares, antireflective coatings can be applied to one or both faces for improved transmission, cutting down or edged to special shapes and sizes at short notice, and available in sets supplied in a wooden storage box for research and laboratory use.

The FNG3050 Absorptive Glass Neutral Density Filter is used to attenuate light by absorption in applications such as spectroscopy, machine vision, ellipsometry, and photography.

Yes, Knight Optical offers an extensive custom optic service and can supply ND filters cut to sizes and shapes to fit individual applications and mount filters where applicable.

Attenuation in the FNG3050 Absorptive Glass Neutral Density Filter is achieved by polishing glass to the correct thickness.

The FNG3050 Absorptive Glass Neutral Density Filter is available in 12.5mm and 25mm diameters, and 50x50mm squares.

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