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在选购“傻瓜”照相机时,常会遇到营业员主动介绍某某相机具有防红眼功能。那么,什么是“红眼”?“傻瓜”相机为什么要设置此功能呢? 我们知道,人眼睛的瞳孔是能够随着环境的明暗自动调整大小的,即光线强时瞳孔缩小;光线弱时瞳孔扩大。如果在光线比较暗的环境中,使用一般的内藏闪光灯式“傻瓜”相机拍摄彩照,若拍摄距离很近,人眼正对镜头且与镜头高度一致,此时扩大了的瞳孔的
In the purchase of “fool” camera, often encounter salesperson take the initiative to introduce a certain camera with red-eye reduction function. So, what is “red-eye”? “Fool” camera why set this function? We know that the human eye pupil is able to automatically adjust the size of the environment with the light and shade, that is, when the light is strong, the pupil is reduced; when the light is weak, the pupil is enlarged . If you use a built-in flash “fool” camera to take pictures in a dark environment, if the camera is close, the human eye is facing the lens and the lens is highly consistent. At this time, the enlarged pupil