大家在查： exports exporting JAXP 放缓 defining 练 woodcutter 口感 obeyed 书桌

焦距

n.【摄】focal length
网络focus; focal distance; Zoom

焦距

英-汉网络释义

焦距

n. na.

1.【摄】focal length

1

In measuring the focal distance of lens , the experimental accuracy is often affected by the poor quality in the formation of images.

在测量透镜焦距时，往往由于成像质量差而影响实验的精度。

2

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。

3

He took a deep breath and stared , unseeingly, at the ground for a long moment .

他重重喘了口气低头盯着，却毫无焦距的，盯着地面好一阵子。

4

The focal length you need depends on your distance from the burst and what you're trying to capture .

你所需要的焦距取决于你和被拍摄焰火间的距离，以及你想捕捉到怎样的画面。

6

Objective and the focal length of the specimen to be measured . The measurement of the size of the reticle .

十字线的像的尺寸取决于准直仪物镜的焦距和待测样品的焦距。

7

I didn't have to set the focus as I had a wide-angle lens; I knew , so long as I had the right exposure , the depth of field was enough .

我无需调整焦距，因为我用的是广角镜头；我知道，只要使用正确的曝光组合，便能得到足够的景深。

8

To determine power , divide the focal length of the telescope (in mm ) by the focal length of the eyepiece (in mm ).

将望远镜的焦距（单位：mm ）除以目镜的焦距（单位：mm ），就可以得到望远镜的放大率。

9

The focal length of the condensing 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。

10

11

It can be used to really evaluate the optical performance and imaging characters at any focal length of a zoom system .

可借助该程序对变焦系统任意焦距位置的光学性能和像差特性进行实时评估。

12

He took out the binoculars and adjusted the FOCUS .

他取出双筒望远镜并调整了焦距。

13

Or , you can calculate the exit pupil by dividing the focal length of the eyepiece (in mm) by the focal ratio of the telescope .

或者，你还可以将目镜的焦距除以望远镜的焦比来得到出瞳尺寸。

14

Once you're at eye-level, mix it up. Get in really close and shoot with a wide angle , and then try further away , zoomed in.

如果你与儿童的视线等高的话，掺和一下：走近一点用广角拍摄，然后离远一点，拉近焦距镜头进行拍摄。

17

The automatic adjustment in the focal length of the lens of the eye to permit retinal FOCUS of images of objects at varying distances .

眼调节眼睛瞳孔对焦距的自动调节，以获得不同距离的物体在视网膜上的成像

18

She made a few minor adjustments to the focus of her camera .

她把摄象机的焦距进行了一些小小的调整。

19

The more light pass through , the lower F number is . Shown in the following figure , F is the ration of focal length and effective diameter.

数值愈小表示通过的光量多，F 数值是焦距长和有效开口的比值。

20

Focal length : The distance between the centre of a lens and its principal focus .

焦距：镜头中心与其主焦点的距离。

21

The longer the focal length of the telescope , generally the more power it has, the larger the image and the smaller the field of view .

一般来说，望远镜的焦距越长，它的放大率就越大，成像的尺寸就越大，但是视场范围就越小。

22

24

The aperture size (area of the aperture) of a lens could be calculated from focal length and the correspondent f-number .

光圈孔的大小，可从镜头的焦距与焦距比数中计算出来。

25

The eye that has no focal distance voicelessly opens , and northern wild strong eyes four eyes are inverse.

毫无焦距的眼，静静的张开，和北野烈的眼眸四目相对。

26

With her Leica , she uses pre-set focus distance , works to shoot within that focus range and relies upon depth-of -field for sharpness.

在使用莱卡相机的时候，她使用原始焦距，在此焦距范围内进行拍摄，利用景深提高拍摄质量。

27

The short film Powers of Ten begins with an aerial shot of a couple picnicking in a Chicago park .

《十倍焦距》短片发生于在芝加哥公园空中射击的野餐会。

28

In taking a picture , the shutter, the focal length and the other things must be adjusted as the case may be .

在拍照过程中，快门、焦距等等必须按实际情况加以调整。

29

The trick was to shoot on the periphery with a long lens to isolate the birds against a quiet background .

这张照片的是通过长焦距镜头拍摄的，将其它鸟类隔离，留下一个安静的环境作背景。

30

At present , some difficulties are encountered in measurement of long focal -length of mirrors.

目前，大口径长焦距反射镜焦距的精确测量存在很大难题。

热词推荐

大家在看