「Doc:Glossary/Focal Length」の版間の差分
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2011年10月15日 (土) 18:54時点における版
Focal Length
Is the distance along the optical axis from the lens to the focus (or focal point). The inverse of a lens' focal length is called its power.
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Is the distance along the optical axis from the lens to the focus (or focal point). The inverse of a lens' focal length is called its power.
