你使用多大的光圈?。
Adjust the shutter speed and aperture.
校准快门速度和光圈。
The airy disk becomes smaller as you increase the aperture.
当你增加孔径的尺寸时，艾里斑会变小。
Set aperture to f32 - this was the smallest I could get on the lens.
光圈调至f32-这是镜头上的最小光圈。
This is the ratio of the focal length of the telescope to its aperture.
这是指望远镜的焦距与其孔径的比值。
It works by separating the mirror flip and aperture opening into two steps.
它将镜面翻转和光圈打开分为两个步骤。
This mode needs a lot of light, and you can't adjust the aperture yourself.
这种模式需要较充足的光线，并且你不能在拍摄的时候调整光圈。
For example, the maximum power on a 60mm telescope (2.4 "aperture) is 142x."
比如，孔径为60mm(即2.4英寸孔径)的望远镜最大放大率为142x。
It widened smoothly. Soon he'd made an aperture twenty-five centimeters across.
它顺利地变宽了，很快成了一个25公分的孔。
Taking control of the shutter and aperture isn't easy, but the rewards can be great.
同时控制快门和光圈并不简单，但却绝对值得。
The main lens is fixed in place; there is no auto-focus, auto-aperture, or other gubbins.
主要镜头是固定的，没有自动对焦和自动光圈以及其他小配件。
To calculate exit pupil, divide the aperture (in mm) by the power of the eyepiece being used.
为了计算出射光瞳，可将孔径(单位mm)除以目镜的放大倍数。
At any given magnification, the larger the aperture, the brighter and sharper the image will be.
对于任何放大率的望远镜，孔径越大，其成像亮度越高，成像边缘越锋利。
The larger the aperture, the more light it collects and the brighter and clearer the image will be.
孔径越大，它收集的光越多，成像的亮度和清晰度就越好。
Putting the dial on "s" tells your camera "I am deciding the shutter speed, you set the aperture for me."
将指令盘拨到“S ”来告诉你的相机：我设定快门速度，而你来调整光圈。
The APG-79 AESA synthetic aperture radar (SAR) has a higher success rate than previous radar technologies.
同先前的雷达技术相比，APG - 79AESA合成孔径雷达(SAR)具有更高的成功率。
Notice that perhaps your camera will select, on its own, a shutter speed of 1/125 with an aperture of F11.
注意相机可能会自动将快门速度设到1/125，光圈设到F11。
The rule is that the smaller the number, the wider the aperture and the more light that can hit the sensor.
规则是数字越小，光圈越大，能到达传感器的光也越多。
Using an aperture of 2.8 or 4 will allow you to use selective focus, putting more emphasis where you choose.
使用F2.8-F4左右的光圈，并且选择性的对焦，将您想要强调的部分放在焦点上。
The limiting magnitude is directly related to aperture, where larger apertures allow you to see fainter stars.
边缘亮度直接与孔径相关，孔径越大，就能看到越暗的星。
For example, the focal length of an 8" (203.2mm) aperture with a focal ratio of f/10 would be 203.2 x 10 = 2032mm.
比如，孔径为8英寸(203.2mm)，焦比为f/10的透镜，其焦距为203.2x 10 = 2032mm。
Goode said that the images were achieved with the 1.6 m clear aperture, off-axis New Solar Telescope (NST) at BBSO.
古德说这些图像由大熊湖天文台的1.6米通光孔径离轴新型太阳天文望远镜拍摄。
For example, the limiting magnitude of an 8" aperture telescope is 14.0. (7.5 + 5 LOG 20.32 = 7.5 + (5x1.3) = 14.0).
比如，孔径为8英寸的望远镜的边缘亮度是14.0 (7.5 + 5LOG 20.32 = 7.5 + (5x1.3) = 14.0)。
If you're really feeling bold, try going to manual mode where you control both the shutter and the aperture yourself.
如果你觉得自己足够大胆，那就试试使用手动模式让自己同时控制快门和光圈。
Airy disk brilliance (the brightness of a point-source stellar image) is proportional to the fourth power of aperture.
艾里斑的亮度(点光源恒星的图像亮度)正比于孔径尺寸的四次方。
Now in part two we're going straight to manual mode to learn about aperture sizes and shutter speeds. So let's do this thing.
那么现在，进入了第二部分的我们将要开始学习光圈大小以及快门速度，让我们这就开始吧。
If star trails are desired, using a large aperture and higher sensitivity (ISO 200-400) can enhance the brightness of each streak.
如果需要星光轨迹，那么使用大光圈和较高感光度(ISO 200- 400)就能提高每条轨迹的亮度。
If star trails are desired, using a large aperture and higher sensitivity (ISO 200-400) can enhance the brightness of each streak.
如果需要星光轨迹，那么使用大光圈和较高感光度(ISO 200- 400)就能提高每条轨迹的亮度。
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