thumb|270px|right|Chromatic aberration of a single lens causes different wavelengths of light to have differing focal lengths. An apochromat, or apochromatic lens (apo), is a photographic or other lens that has better correction of chromatic and spherical aberration than the much more common achromat lenses.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).