只要是全自动平视取景照相机 ,不管是单焦点、双焦点 ,还是变焦点（区间式和连续式） ,它们都具有ＡＦ系统。这类照相机在当前的市场上占了很大的份额 ,尤其是现在变焦照相机广为流行。因此照相机维修人员必须对此要有一个系统而全面的了解 ,以下我们作一详细地介绍。ＡＦ的测 As long as the fully automatic head-up camera, whether single-focus, dual-focus, or zoom (interval and continuous), they all have an AF system. Such cameras account for a large share of the current market, especially nowadays zoom cameras are gaining popularity. Therefore, camera maintenance personnel must have a systematic and comprehensive understanding of this, we make a detailed introduction. AF measurement