しょうてんきょり
焦点距離
1. focal length
2. Focal lengthThe focal length of an optical system is a measure of how strongly the system converges or diverges light. For an optical system in air, it is the distance over which initially collimated rays are brought to a focus. A system with a shorter focal length has greater optical power than one with a long focal length; that is, it bends the rays more strongly, bringing them to a focus in a shorter distance.
Read “Focal length” on English Wikipedia
Read “焦点距離” on Japanese Wikipedia
Read “Focal length” on DBpedia
Read “Focal length” on English Wikipedia
Read “焦点距離” on Japanese Wikipedia
Read “Focal length” on DBpedia
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