focal_ratio | ||
1. | [ noun ] the ratio of the focal length to the diameter of a (camera) lens system | |
Synonyms: | stop_number speed f_number | |
Related terms: | ratio | |
focal_ratio | ||
1. | [ noun ] the ratio of the focal length to the diameter of a (camera) lens system | |
Synonyms: | stop_number speed f_number | |
Related terms: | ratio | |