| 单词 |
actinic focus |
| 释义 |
Definition of actinic focus in English: actinic focusnoun Optics Photography rare (With reference to a lens or other optical system) the focal point or focal distance for actinic light.
Origin Mid 19th century; earliest use found in Art-union. Definition of actinic focus in US English: actinic focusnoun Optics Photography rare (With reference to a lens or other optical system) the focal point or focal distance for actinic light.
Origin Mid 19th century; earliest use found in Art-union. |
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