我使用定焦镜头，而不是变焦镜头。
此外摄影家钟爱定焦镜头还有另外两个原因。
There are two other reasons why prime lenses are the available-light photographers' friends.
此款定焦式的望远镜没有个性化的目镜曲光镜调节。
This binocular is of fixed-focus type and has to be used with eye-glasses by anybody with visual defects.
这不同于前几个发行版—轻量级组件缺省情况下不可定焦。
This is different from previous releases where lightweight components were not focusable by default.
所有窗口在缺省情况下都是可定焦的，但在特定情况下需要把窗口设置成不可定焦。
All Windows are focusable by default, but it is necessary to render a window not focusable in certain cases.
在我心目中，我认为在有着众多高质量的变焦镜头时使用“定焦”镜头是无意义的事情。
In my mind, it was pointless having a "fixed" lens when there were so many good quality zoom lenses around.
50mm的定焦镜头总是摄影者的最爱，对于肖像、产品摄影和在弱光条件下表现完美。
The 50mm prime lens is often a photographer's favourite, perfect for portraits, product photography and low light conditions.
本文介绍了GDDJ-1光电定焦仪的工作原理，精度分析以及提高该仪器的精度办法。
The principle of photo fixed-focus apparatus, GDDJ - 1, the analysis of precision and the way to improve the precision of the apparatus are discussed.
作为视野稍微大于50mm定焦的镜头，35 mm镜头在拍摄风景和远景时提供了更多的灵活性。
For a slightly wider view than a 50mm prime, a 35mm lens offers more flexibility when shooting landscapes and vistas.
市面上有种类繁多的镜头，但Gampat推荐首次购买单反的摄友从简单的50mm定焦镜头入手。
There are many, many different lenses available, but Gampat recommends that first-time DSLR owners start off with a simple 50mm prime lens .
佳能照相机拍出来的照片色彩比松下的要亮一点，但松下的16倍变焦比佳能的14倍变焦让我能定焦更远。
Color captured in images using the Canon looked a little brighter than those captured with the Panasonic, but the Panasonic's 16x zoom offered further reach than its rival's 14x lens.
通过镜组移动改变正、负傅里叶变换系统的距离，用软件比较CCD上两个波峰的间隔是否变化来对CCD进行定焦。
When the distance between positive and inverse Fourier transform system changes, the CCD is adjusted to the focal plane by variable value of interval between two peaks on CCD with computer.
文章介绍了CBERS -1卫星的CCD相机的光学拼接、配准和定焦技术，它们是获得高清晰度图像的关键技术。
The paper introduces the key techniques of CCD camera for CBERS-1 satellite, which includes optical butting, registration and focus_fixing, they are very critical to obtain high_resolution images.
50mm定焦镜头在较大价格范围内的平均光圈是F1.4，便宜的（镜头）光圈为F1.8，较贵的（镜头）光圈为F1.2。
The 50mm prime on average allows an aperture around F1.4 on a mid ranged price lens, F1.8 on the cheaper ones and F1.2 on the pro series.
当个人与领导人不在微不足道的事情上定焦、而在比他们自己更大的事情上聚焦时，你们每个人都会学到以团队工作达到下一步。
As individuals and leaders lose focus on petty concerns and focus on something greater than themselves everyone of you will learn to work as a team to achieve the next step.
很多时候被误解为对焦快的镜头-_-我个人喜欢佳能50毫米定焦1.4光圈或者1.8光圈镜头。尼康也有相同型号标准高速镜头可以在室内或低光条件拍摄时，提供高品质的图像。
I like the Canon 50mm 1.4 or 1.8 (I'm sure there is a comparable Nikon) a faster standard lens will allow you to take great food shots when you are indoors or when less light is available.
石油焦是炼油工艺的副产品，具有低灰分、一定挥发份和高热值的特性。
As a byproduct of crude refining process petroleum coke features a low ash content, moderate volatility and a high heating value.
详细描述了神光装置激光聚变物理实验靶瞄准定位系统的原理和结构，提出了“空间坐标法”进行靶定位和靶瞄准，利用“离焦定半径”完成了激光调焦。
We use a space coordinate method to position and point the target and align the laser beam, and use an off-focus radius-finding technique to find the laser focus.
前者试验获得了一定激光功率和离焦量条件下两组焊接速度和送丝速度的匹配关系，并发现填充焊丝的加入对焊缝咬边现象确有改善；
Two groups of matching relation of the weld speed and the wire feed rate were found in a condition of invariable laser power and focus position.
在CO2气化反应过程中，由于产生的含硫气体比较少，催化剂中铁元素对残渣半焦的CO2气化起到了一定的催化作用。
During the CO2 gasification reaction process, due to less sulfur content gas generated, the iron element in the catalyst would have certain catalyst effect to CO2 gasification of the semi-coke.
这种方法在一定程度上降低了变焦系统光焦度分配的难度，同时为探寻新的变焦运动方式提供了新的思路。
This method helps to reduce the difficulty of power allocation and provides different ways to find the new compensation mode.
研究结果表明：回波强度受导引头光路中光学镜头的相对孔径、摄像管靶面倾斜和离焦的影响较大；扫描激光光束的入射角等因素对回波强度也有一定的影响。
Research results show that the relative aperture of optical lens, the incline and defocusing of reflection plane in TV seeker optical system reduce the intensity of the "cat's eye" reflection.
研究结果表明：回波强度受导引头光路中光学镜头的相对孔径、摄像管靶面倾斜和离焦的影响较大；扫描激光光束的入射角等因素对回波强度也有一定的影响。
Research results show that the relative aperture of optical lens, the incline and defocusing of reflection plane in TV seeker optical system reduce the intensity of the "cat's eye" reflection.
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