Lens centre: This specifies the centre of lens distortion, measured in pixels.

透镜中心：这指定的是透镜畸变中心，单位为像素。

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Focal length: The distance between the centre of a lens and its principal focus.

焦距：镜头中心与其主焦点的距离。

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So no lens bending error. The sensor Pixel is always the same and it is in the centre.

如果不存在透镜的曲率误差，那么图象总是显示的屏幕中心的同一个位置。

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"I set up one camera with a wide-angle lens for a wide view of the whole cathedral, and another with a longer lens trained on the centre of the cathedral floor below, " says Lipinski.

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Light shone in from the side, between the two, was guided around each tiny lens, creating a small cloaked region in the centre of each one.

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The 19-year-old was at the centre of a major row in 2009 when he was accused of breaking his contract with Lens two years before in order to join Chelsea.

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