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- focal length ratio 焦距比
- A typical lens has a focal length(f)of 625 mm. 常见镜头的焦距(f)为625毫米。
- Determine the focal length of your lens. 决定你镜头的焦距。
- C: Can I control the focal length? 我能控制焦距吗?
- What is the best focal length for bird photography? 拍摄鸟儿最适合的焦距长度是多少?
- The ratio of the focal length of a lens or lens system to the effective diameter of its aperture. F值物镜或物镜系统的焦距与入射光孔直径之比
- The focal length of a given lens is different for different colors. 一个特定的透镜的焦距因颜色的不同而不同。
- The focal length is set to Flat stitch in the Properties window. 焦距在特性窗囗中被设定成平坦的一针。
- This photogragh is shot by lens with a long focal length. 这张照片是用长镜头拍摄的。
- The result reveals that small geometric focal length and large angle may decrease the -3dB focal area, and increase length to width ratio and the pressure magnitude of main lobe. 由结果得知,曲率半径愈小张角愈大会导致烧灼面积减小、长宽比增加以及压力主峰值的提高。
- The focal length of the camera lens plays an important role in photo criteria. 摄影机镜头的焦距在摄影规范中起着重要的作用。
- If this joint length ratio is greater than 10, the rock is likely to be blocky. 采用切割法找到所有组成岩体的任何块体,基于裂隙的平均长度与平均间距,引进产生三维裂隙多边形的统计方法。
- Focal length The distance between the centre of a lens and its principal focus. 镜头中心与其主焦点的距离。
- The solid tunable focal length microlens in our study is still a prototype. 本研究所提出之固态调焦透镜兼具微小化、积体化、可单一或阵列使用、及系统整合性高等优点。
- G3's body length ratio F3 big 67mm, wheelbase stretched 10MM, but the car width, car high, front and rear the same. G3的车体长度比F3大67mm,轴距拉长10MM,但车宽、车高、前后轮距完全相同。
- Here the combinations of Testcharts and measuring objectives for different focal length ranges are preset. 在这里预置不同焦距范围的测量物镜与测试图表之间的组合。
- Spot diameters of just a few thousands of an inch can readily be attained with convenient short focal length lenses. 用普通的短焦距透镜不难得到直径只有几十微米的光点。
- As a result, the focal lengths in these planes will be different. 结果,这两个平面内的焦距将不同。
- Flaw process was controlled by factors such as choke ratio, width to length ratio, the ratio of film outlet to the main flow and the inlet Reynold numbers, etc. 影响流动的主要因素是通道的阻塞比、长径比、宽高比、气膜出流比和进口雷诺数。
- The focal length of the conelensing lens should be such that the image of the source just fills the projecting lens. 聚光透镜的焦距应使光源的像正好照满放映透镜。