English dictionary
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English noun: focal ratio | |||
| 1. | focal ratio the ratio of the focal length to the diameter of a (camera) lens system | ||
| Synonyms | f number, speed, stop number | ||
| Broader (hypernym) | ratio | ||
Based on WordNet 3.0 copyright © Princeton University.
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Web design: Orcapia v/Per Bang. English edition: .
2025 onlineordbog.dk