6SL3352-1AE41-2FA1

6SL3352-1AE41-2FA1

6SL3352-1AE41-2FA1

6SL3352-1AE41-2FA1

很多镜头都有对焦距离标尺。距离标尺上标注着从近对焦距离到远的刻度。不过我从来没有发现靠标尺上的刻度就能准确对焦的，真的。

距离标尺真正有用的作用，是提醒你近对焦距离是多少——尽管这个参数经常会在镜头上单独标注出来。

景深标尺

有对焦距离标尺的镜头通常都有景深标尺。景深标尺上会标有“22”、“11”和“8”的字样。取决于镜头设计，标准的数字也有可能略有不同。

这些数字用来显示在一个特定光圈下的景深与对焦距离之间的关系。当你将光圈设在f/22，并对焦在远，你可能会发现在3米之后的景物都是清晰的。

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