Lighttight

Japanese: lighttight
Lighttight

...There are five basic functions that a camera must have to achieve this: (1) A light-tight body: At least the film part must not be exposed to light (this is called light-tight) except when the film is exposed. Also, when the film is exposed, only the light that passes through the lens must hit the film.

*Some of the terminology explanations that mention "lighttight" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…このためにカメラが備えていなければならない基本的な機能として,次の五つをあげることができる。(1)光密なボディ フィルムに露光を与えるとき以外は少なくともフィルム部分に光が当たらない(これを光密lighttightという)ようになっていること。また露光する場合も撮影レンズを通過した光線だけがフィルムに当たること。…

※「lighttight」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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