focal ratio-n
type: LexicalEntry
canonical form: focal ratio
sense: 13843620-n
part of speech: noun

f number-n
type: LexicalEntry
canonical form: f number
sense: 13843620-n
part of speech: noun

stop number-n
type: LexicalEntry
canonical form: stop number
sense: 13843620-n
part of speech: noun

speed-n
type: LexicalEntry
canonical form: speed
sense: 13843620-n
part of speech: noun

13843620-n
type: LexicalConcept
in scheme: en-word.net
definition: the ratio of the focal length to the diameter of a (camera) lens system
ili: i109535
lexfile: noun.relation
part of speech: noun
hypernym: 13841419-n