小望远镜

The lens system comprises four separated lens components, with three of them being subapertures. Two examples of apochromatic telescope are presented, both with the use of typical normal glasses, namely crown K9 and flint F5 glasses, and low-cost slightly anomalous dispersion glasses.

本文介绍了一种采用小异常色散玻璃复消色差的新型结构形式的光学系统，由四个分离的透镜组构成；给出了两个望远镜物镜设计实例，均使用价格便宜的非异常色散玻璃，校正了二级光谱、倍率色差，同时也校正了其他色差和单色像差。

The insets to the right of the composite show how each telescope individually views the Cartwheel.

右侧插入的小图是每架望远镜各自眼中的车轮星系。

Also have Sirius B, centering at around Sirius A, but due to small size, can not be seen by the naked eye until 1862, American astronomer Alvin Clark with the largest at that time, the latest celestial telescope, they discovered its existence.

另外还有天狼星 B ，围绕在天狼星 A 的周围，但因体积小，无法以肉眼看到，一直到 1862 年，美国天文学家艾尔文·克拉克用当时最大、最新的天体望远镜，才发现了它的存在。

Schmidt realized that by employing a large spherically shaped mirror (instead of the normal paraboloidal mirror of a reflector telescope) and a smaller apertured diaphragm placed at the center of curvature of the mirror, he could at a stroke eliminate coma and astigmatism.

施密特认识到雇用一个大球型镜（而不是正常的抛物面反射镜的反射望远镜）和一个较小的光阑膜片放置在中心曲率的镜子，他可以在消除中风昏迷和散光。

Hubble made precise measurements of Cepheid variable stars in the galaxy, highlighted by green circles in the four inset boxes.

哈勃望远镜精确测量了星系中的造父变星（四个小图中用绿色圆圈标出）。

Much of the gas in the disk of the Circinus spiral is concentrated in two specific rings -- a larger one of diameter 1,300 light-years, which has already been observed by ground-based telescopes, and a previously unseen ring of diameter 260 light-years.

在圆规座的漩涡星系中的大部分气体都与两个具体的"环"有密切的联系。那个较大的，直径大约有1，300光年，它已经被地基望远镜观测到了。而先前，我们没有观测到的那个小"环"，直径大约有260光年。

The remaining three contenders display a rather narrow angle (tunnel-view), and I believe that fields as narrow as 50 degs. or less are no good choice for military binoculars, where the surveillance of large areas is among the most common applications and much easier achieved with reasonably wide angles.

其它3款表现了明显的窄视角，我认为是50度甚至更小的视场对军用望远镜不是好选择，因为大面积的监视是最常见的应用，拥有适度的宽视角更容易完成任务。

The eye-relief is rather short, and the eye-cups cannot be folded - this binocular is therefore not suitable for use with eye-glasses.

但其出瞳距离很小，并且眼罩不可翻折，因此该款望远镜并不适合佩带眼镜者使用。

And suddenly the two bottles begin to walk and patter off through a side gate, and the 20 000 people who are standing in the most steeply tiered stadium in the world begin to compose themselves on their little cushions, or take out field glasses, or give their fashion, with the back of the hand being tossed over the shoulder .

突然，那两个酒瓶开始行走，叭嗒叭嗒穿过旁门走了出去，站立在有着世界上最陡的看台的运动场上的两万人开始在自己的小垫子上安顿好坐下，或者拿出望远镜，或者手背向下在肩上摆动，用这一古怪的西班牙方式向远处的朋友最后招手致意。

Using the K20 eyepiece included as standard equipment, about 45x magnification, it's easy to see the Andromeda Galaxy and its smaller satellite galaxy M32. When compared to 60mm refractors, the Powerseeker 114 brings out much more detail in the Orion Nebula, reveals many more stars in Perseus' Double Cluster and even brings out a few individual stars in globular clusters like M13. Saturn looks quite small at 45x with the K20 eyepiece, but using my own 7.5mm eyepiece (120x) I can easily detect the shadow cast by the planet on the rings, and even glimpse the ring's Cassini Division. When the mirrors are properly lined up or "collimated," the images are reasonably sharp up to magnifications of 225x.

使用标准配件中的K20 目镜，可以得到45倍放大率，这时候很容易看到仙女座星系，还有较小的星系M32；和60毫米口径的折射望远镜相比，114 EQ可以看清更多猎户座星云的细节；瞄准英仙座双星团，看到的星体数量更多，显得更加壮丽；对于球状星团，比如M13，甚至可以显出其中少数独立的恒星；在K20 目镜下（放大45倍）的土星显得相当小，但换成我自己的7.5毫米焦距的目镜(得到120倍)，可以轻松的看到光环在土星上的投影，甚至可以瞥见土星光环内的卡西尼缝隙。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。