So what is the ideal shape for the lens opening?

因此光圈理想的形状是怎样呢？

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The effect is akin to a lens opening up to the view across a bay and other islands beyond.

设计效果如同一个镜片，打开海湾和其他岛屿的无限风光。

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A usually adjustable opening in an optical instrument, such as a camera or a telescope, that limits the amount of light passing through a lens or onto a mirror.

光学仪器上的一个可调开口，如照相机或望远镜，它控制穿过镜头的或到镜面的光的数量。

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We are also very proud to introduce the first one-lens 3D system alongside the NX300, opening up a whole new world of 3D photography and video recording for consumers everywhere.

ENGADGET: Samsung unveils 3D-capable NX300 mirrorless camera and 45mm f/1.8 2D/3D lens ahead of CES, we go eyes on (update)

They do that with a conventional camera by opening up the aperture of the lens and selecting a faster shutter speed.

ECONOMIST: Tech.view: Me no Leica any more | The

England's opening World Cup match is against the USA in Lens on 8 September, followed by further pool games with South Africa, Samoa and Tonga.

BBC: Tindall & Hodgson miss World Cup