最終更新日：2024/08/04

Any of the arbitrary alphanumeric codes in a system for labelling optical filters, usually for photographic use.

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Wratten number

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Wratten number

noun

Any of the arbitrary alphanumeric codes in a system for labelling optical filters, usually for photographic use.

The Wratten number is used to classify photographic filters.

意味（1）

Any of the arbitrary alphanumeric codes in a system for labelling optical filters, usually for photographic use.