After scoring, Sneijder sprinted around the field, tapping the front of his head, then ran to a TV camera and tapped the lens.

在进球后，斯内德一边轻敲自己的前额，一边绕着场地急速奔跑，然后跑到一台电视摄象机前，轻弹摄像机镜头。

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The f-stop, otherwise known as the aperture, determines your depth of field (the area in focus) and how much light can pass through the lens to reach the sensor.

f制光圈(或称光圈)决定相机的景深(对焦区域)以及有多少光能通过镜头到达传感器。

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The design of a new kind reflective field lens is introduced in this paper.

本文介绍一种新型的反射式场镜的设计。

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The technique employed to find the new planet uses the gravitational field of a star like a lens - magnifying the light from a distant background star.

BBC: Tiniest extrasolar planet found

The wide-angle lens give allows expanded field of view needed for group shots, ensuring everyone is in frame even in a close-up shot whilst the powerful zoom makes it possible to capture detailed photos even when the subjects are of a distance.

ENGADGET: BenQ's 14 megapixel S1420 camera touts mega O.I.S., 720p movie mode

As for the liquid lens, Nippon Electric Glass' version uses low-power electric field to control its liquid crystal molecular orientation, thus changing the focal point.

ENGADGET: Nippon Electric Glass demos liquid crystal lens and 'invisible glass' at CEATEC (video)