...The method of electrically measuring the brightness of the subject to determine the amount of exposure was the old one that used a selenium photocell, and the first camera to incorporate this was the Zeiss-Ikon twin-lens reflex Contaflex, which was released in 1935. A camera equipped with a mechanism that can automatically set the amount of exposure is called an EE camera (EE stands for electric eye) or an AE camera (AE stands for automatic exposure). The origin of automatic exposure was a method in which the needle of a meter is made to swing using the output current of a photocell, which is held down by a stepped cam, and the lens aperture is automatically controlled by the cam's stroke (shutter speed priority system). The first commercially available camera to adopt this system was the Super Kodak 620, released in 1938. On the other hand, the system of directly controlling the shutter speed using the output current of an exposure meter (aperture priority system) was first put to practical use in the Polaroid Automatic 100, released in 1963. ... *Some of the terminology that refers to "AE camera" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…露光量を決定するために被写体の明るさを電気的に測る方式としてはセレン光電池を用いたものが古く,これをカメラに組み込んだ最初はツァイス・イコン社の二眼レフ,コンタフレックスで,発売は35年である。露光量を自動的に設定できる機構を備えたカメラをEEカメラ(EEはelectric eyeの略),またはAEカメラ(AEはautomatic exposureの略)というが,光電池の出力電流によりメーターの針を振らせ,これを階段状カムでおさえ,カムの行程でレンズの絞り値を自動的に制御する方式(シャッター速度優先式)が自動露出の始まりで,これを採用した最初の市販機は38年発売のスーパーコダック620である。一方,露光計の出力電流により直接シャッター速度を制御する方式(絞り優先式)は,63年発表のポラロイドオートマチック100で初めて実用化された。… ※「AE カメラ」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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