如果你喜欢拍摄翱翔天际的飞禽和横闯森林的走兽，或者你想要偷拍对面的心动男孩，你可以选择具有内置镜头和大焦距的相机。
If you like taking photos of birds or other wildlife, or if you’re just a peeping Tom, you can get a superzoom camera with a built-in lens with an insane focal length.
如果你想知道使用时的焦距和距离数据，镜头自带的LCD显示屏可以告诉你。
Need to know the focusing and distance Numbers? Just check the lens' built-in LCD.
照相机镜头有两项一般属性：f制光圈和焦距。
Camera lenses have two general attributes: f-stop and focal length.
三井说：“iPhone 3gs只有一个不能调焦距的镜头，这让我把注意力完全放在构图和最佳拍摄时机上。”
"The iPhone has a single-focus lens with no zoom, and this simplicity keeps me devoted to only composition and the perfect photo opp," Mitsui says.
如果你知道视野FOV，感应器大小，和工作距离，你能用以下之方程序去计算你所需之镜头的焦距。
If you know the FOV, sensor size, and working distance, you can compute the focal length of the lens you need using the following formula.
曼富图303云台还可允许用户设定相机旋转角度和配套的镜头焦距长度。
The Manfrotto 303 also allows the user to set the degree of camera rotation set in relation to the focal length of the lens being used.
一个镜头的基础定义是其焦距，图4图示出镜头焦距，视野，感应器大小，和工作距离间之关系。
A lens is primarily defined by its focal length. Figure 4 illustrates the relationship between the focal length of the lens, field of view, sensor size, and working distance.
该文首先从短焦距镜头和给定cCD成像阵列的成像特性出发，分析了实现亚像元成像与定位的必要性。
Based on the characteristics of short focus lens and CCD array, the necessity of sub-pixel imaging and location is analyzed.
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 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.
介绍了变焦距镜头在高速电视测量仪中用于精密测量的控制和标校方法。
Introduced a method of controlling and calibrating focal length about zoom lens used in precision measurement in High-Speed TV measurement Instrument.
这些图像是错层的，这意味着博特略的镜头一半是在水里一半是露在水外，以同时捕捉安伊和飞机于焦距内。
The images are split-level, meaning Botelho's lens was half in and half out of the water to capture both Ane and the jets in focus.
它装有广角镜头和长焦距镜头。
本教程涵盖了适用于任何相机的基本概念，比如镜头的焦距和摄影机的位置。
The course covers fundamental concepts that apply to any camera, such as focal length and camera position, and shows how to evaluate and shop for DSLR lenses.
本教程涵盖了适用于任何相机的基本概念，比如镜头的焦距和摄影机的位置。
The course covers fundamental concepts that apply to any camera, such as focal length and camera position, and shows how to evaluate and shop for DSLR lenses.
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