在每年的初中物理竞赛辅导中,老师和学生又会对相机涉及的光圈、快门组合题目进行讲解和训练。但某些原题目的解释隐晦、难明。本人根据胶片的感光原理,结合曝光量是由光圈值和快门速度共同决定的,整理出另一种更清晰的解法。 In the annual junior high school physics competition counseling, teachers and students will be on the camera involved in aperture, shutter combination topics to explain and training. However, the purpose of some of the original title is subtle and difficult to explain. According to the film I photosensitive principle, combined with the amount of exposure is determined by the aperture value and shutter speed, sorted out a clearer solution.