由于电子技术的发展,照相机已经进入了采用电子元件实现自动控制的阶段。电子快门相机就是曝光自动控制照相机中的一种。实践证明,在现在生产的机械快门相机上,进行适当的改动,增加电子控制部分,成为电子快门相机是完全可能的。本文想就一般的外测式电子快门电路设计中的几个问题进行一下探讨。一、根据曝光原理向电子快门相机提出的要求一般说来,决定曝光的主要因素有下列四项:景物的亮度B、胶片的感光度S、相机上给出的光圈F和快门速度T。为了能准确地表 As the development of electronic technology, the camera has entered the stage of automatic control using electronic components. Electronic shutter camera is a type of exposure control camera. Practice has proved that in the current production of mechanical shutter cameras, make the appropriate changes to increase the electronic control part of an electronic shutter camera is entirely possible. This article would like to discuss some general problems in the design of electronic shutter circuit. First, according to the principle of exposure to electronic shutter camera requirements Generally speaking, the main factors determine the exposure of the following four: the brightness of the scene B, the film’s sensitivity S, the camera gives the aperture F and shutter speed T. In order to accurately table