One of the most helpful tips that an old pro photographer once gave me was to use my zoom lens as a compositional aid rather than a way to get close to my subject .

一个摄影老行家曾告诉我的很多有用建议之一便是用变焦镜头来辅助构图，而非走近我的拍摄体。

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But Mr. Koch, the old pro, was doing me the favor of engaging me in conversation so that the resulting image would look natural, less like a photo op.

WSJ: Ed Koch: A Mayor and His City