200px|thumb|logo of cokin|right thumb|right|Stacked cases of Cokin filters.
200px|thumb|logo of cokin|right thumb|right|Stacked cases of Cokin filters.
Cokin is a French manufacturer of optical filters for photography. The system allows filters such as rectangular graduated neutral density filters which are versatile in use.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).