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Neutral Density Filter

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Neutral Density Filter reduces the brightness of an image without changing the color of the scene. It allows all wavelengths to pass through equally. Neutral density filters are categorized by their optical density (D) which is defined as the logarithm to the base 10 of the reciprocal of the transmittance (T): T=10-D
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86-431-84563660

ADD:Building 7,No. 946,Chaoyue street,High-tech zone,Changchun city,Jilin province,China (130012)

Tel:+86-431-84563660

Fax:+86-431-84563660

Tian Cheng Optics Co., Ltd. 

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