The resolution index of electron diffraction in TEM is analyzed. The exactly experimental method is given for demarcating electron diffraction camera length by Gold-monocrystal in TEM.

同时对TEM中的电子衍射分辨率指数进行了分析和讨论，并给出了实际应用金单晶标样精确标定TEM电子衍射相机长度的实验方法。

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This can be a tedious process because the first time you create the plane, you have to rotate the camera and change the focal length at the same time to get a good match.

这个过程可能很乏味，因为你要先建立平面，还不得不去旋转摄像机，并调节焦距以得到好的匹配效果。

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He also imagined radio, television and camera equipment at arm's length on the desk.

奥特勒还设想在手臂可及的桌子上摆上收音机、电视和照相设备。

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By using this adapter to attach any K-mount lens onto a PENTAX Q series camera, the focal length of the lens is extended by approximately 5.5 times in the 35mm format.

ENGADGET: Pentax launches Q10 interchangeable lens camera, K-5 II and K-5 IIs flagship DSLRs

With three glass lens elements in three groups, it can be used as a wide-angle lens equivalent with a single focal length of 30mm (35mm camera equivalent).

ENGADGET: Olympus E-PL5 and E-PM2: Micro Four Thirds cameras with OM-D-like focusing, performance boosts (hands-on)

This camera differs from the DP2 Merrill, which was released in June, due to its wider focal length.

ENGADGET: Sigma finally announces price and availability for DP1 Merrill compact