• What some of us DSLR users don't realize until we've grown enough is just how wondrous and useful a good 50mm lens with a wide aperture is.

    然而像我们这些单反相机使用者在有足够多的经验之前,总是很难理解一个光圈的50mm镜头多么实用

    youdao

  • The calculated results are presented and a comparison is made regarded to the power received by the aperture, and some useful results for engineering prac...

    文中给出大量计算结果,并不同口径分布做了比较,得到了若干具有工程意义的重要结论

    youdao

  • The calculated results are presented and a comparison is made regarded to the power received by the aperture, and some useful results for engineering prac...

    文中给出大量计算结果,并不同口径分布做了比较,得到了若干具有工程意义的重要结论

    youdao

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