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- The focal length determines how wide an angle the telescope can view with a given eyepiece or size of a CCD detector or photographic plate. 焦距决定了望远镜在配上目镜、一定大小的CCD或普通底片后可能观看的视野大小。
- focal length determination 焦距测定
- 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 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 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。
- Its length determines the duration of the project. 它的长度就是确定工程任务的工期。
- 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。
- Objectives: To evaluate different methods of length determination in acute displaced midshaft clavicle fractures. 目的:评价各种测量长度的方法在急性移位的锁骨中段骨折中的作用。
- 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。
- Results:The accuracy of length determination was significantly higher by SM-TR-ZX automatic root canal treating machine than by exploration or X-ray examination (P<0.01). 结果:SM-TR-ZX全自动根管治疗机电测法的准确性明显高于器械探查法和X线照片法(p<0.;01);
- 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。
- 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。
- This bookish inclination at length determined by father to make me a printer. 这种爱书嗜好终于使父亲决定让我当名印刷工。