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自动调焦系统有几种方式,一种是焦点检测方式,一种是三角测距方式,在照相机里还有一种是超声波测速器。本文主要介绍前两种方式。
There are several ways of auto-focus system, one is the focus detection method, one is the triangulation method, there is a camera in the ultrasonic tachometer. This article mainly introduces the first two ways.