And he focused on a feature of Prototaxites that had long puzzled scientists: these strange rings.
他专注于长期困扰科学家的原紫杉类的一个特征：这些奇怪的环。
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| 词汇 | Focus ring |
| 分类 | 英语词汇 英语翻译词典 |
| 释义 |
Focus ring
原声例句
PBS地球-动物趣闻 And he focused on a feature of Prototaxites that had long puzzled scientists: these strange rings. 他专注于长期困扰科学家的原紫杉类的一个特征：这些奇怪的环。
英语百科
Manual focusIn the field of photography, a manual focus camera is one in which the user has to adjust the focus of the lens by hand. Before the advent of autofocus, all cameras had manually adjusted focusing; thus, the term is a retronym. The focus itself may be adjusted in a variety of ways. Larger view cameras and the like slide the lens closer or further from the film plane on rails; on smaller cameras, a focus ring on the lens is often rotated to move the lens elements by means of a helical screw. Other systems include levers on the lens or on the camera body. |
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