Set the lens aperture to the aperture value designated by the flash unit according to the ISO setting your camera.

按照您相机上闪光装置ISO设置，设置好镜头的光圈大小。

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Camera lens should be set to infinity with maximum aperture. then point the camera to perseus or neighbour constellations for a5-minute exposure time and try your luck.

将镜头对焦至无限远，对准英仙座或其邻近星座，把光圈调至最大，曝光5分钟，应有收获。

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The Manfrotto 303 also allows the user to set the degree of camera rotation set in relation to the focal length of the lens being used.

曼富图303云台还可允许用户设定相机旋转角度和配套的镜头焦距长度。

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"Of course, the camera was set to manual and I mounted a wide angle lens that allowed me to include the whole church in the frame, " he says.

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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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