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focal length

美英

n.焦距
网络镜头焦距；焦距长度；焦长

复数：focal lengths

focal length

权威英汉双解英-汉英-英网络释义

focal length

焦距

常用物理英文词汇 - 豆丁网 ... fluid 流体 focal length 焦距 focusing 调焦，聚焦 ...

镜头焦距

特种长距离镜头和电动变倍镜头，生产定做镜头 ... 工作电流 Power Consumption 镜头焦距 Focal Length 变倍比 Optical zoom ...

焦距长度

　　焦距长度（Focal Length）——50mm左右拍摄出来的烟雾更自然　　曝光模式（Exposure mode）——手动　　透镜孔径（Aperture）…

焦长

其焦长 (focal length) 为 f 的镜头, 视角 (angle of view) 为 2*arctan(21.6/f)(2) APS-C 感光元件是 13.8x20.7 mm 到 19.1x28.7 m...

物镜焦距

电气专业词汇 - 天天文档-文档下载中心 ... FMfrequency modulation 调频 focal length 物镜焦距 focus lampspotlight 聚光灯 ...

焦段

4/3镜头全接触,列表.新旧镜头资料对比,介绍... ... Name 名称 Focal Length 焦段 F-StopF 口径 ...

焦距透镜的焦距

航海及海运专业英语词汇(F4) ... focal length 焦距 focal length 焦距透镜的)焦距 focal plane of the light 灯光中心 ...

例句：

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。

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。

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。

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。

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。

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。

Using a longer focal length and photographing stars far from the north star increase the distance stars will move across the image.

使用长焦镜头拍摄远离北极星的星星，会增加星星在相片上移动轨迹。

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。

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

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。

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。

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。

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。

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。

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。

Z sitting on the bed , I am smiling camera position , at the lens, the focal length of the well, set up a regular .

Z 坐在床上，我摆好相机的位置，对准镜头，对好焦距，设置了定时。

One zoom lens can replace several fixed focal-length lensed, but results are likely to be inferior .

一个变焦镜头可以代替多个固定焦矩镜头，但效果很可能比不上。

The lens is set to its widest focal length (38mm of the 35mm equivalent ) and a polarizer is stacked on top of the 28mm UV filter .

镜头设置为最广泛的焦距（相当于 38 毫米的 35 毫米）和偏光是紫外线过滤堆积在上面的 28 毫米。

The focal length was found to be roughly proportional to the radius of the curvature .

发现焦距粗略地和曲率半径成正比。

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