lens: [17] The Latin word for a ‘lentil’ was lēns; and when 17th-century scientists wanted a term for a round biconvex (lentil-shaped) piece of glass, they needed to look no further than lens. English lentil [13] itself comes via Old French from Latin lenticula, a diminutive form of lēns. => lentil
lens (n.)
1690s, "glass to regulate light rays," from Latin lens (genitive lentis) "lentil," on analogy of the double-convex shape. See lentil. Of the eye from 1719.
In the vernacular of the photographer, anyone crowding to the front of a group, staring into the lens, or otherwise attracting attention to himself is known as a "lens louse." ["American Photography," vol. 40, 1946; the term dates from 1915]
实用例句
1. Why aren't all lenses supplied with a lens hood?
为什么不给所有的镜头都配上遮光罩呢？来自柯林斯例句
2. The autoexposure button is awkwardly placed under the lens release button.
自动曝光按钮安装在镜头脱卸按钮下面，十分不便。来自柯林斯例句
3. Your camcorder should have these basic features: autofocus, playback facility, zoom lens.
你的便携式摄像机应该具备以下基本功能：自动聚焦、回放功能、变焦镜头。来自柯林斯例句
4. He took off his spectacles and rubbed frantically at the lens.
