Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
No pronunciation record was provided for this word.
noun
The ratio of the focal length of a lens to its diameter; a measure of the light-gathering ability of the lens.
Definition source: English Wiktionary via Wiktextract
Topics: arts, hobbies, lifestyle, photography
No example sentence was provided for this meaning.
Synonyms: f-value
Antonyms: none provided
History
No etymology was provided for this word.
Across languages
6 source translations are retained for this English entry.
