English dictionary

Hint: With the Firefox addon you can search this dictionary from the browsers search field.

English noun: focal ratio

1. focal ratio the ratio of the focal length to the diameter of a (camera) lens system

Synonymsf number, speed, stop number

Broader (hypernym)ratio

Based on WordNet 3.0 copyright © Princeton University.
Web design: Orcapia v/Per Bang. English edition: .
2018 onlineordbog.dk