将你的相机光圈开到最慢（完全打开）。
Set your camera to its lowest aperture value (completely open).
胶片框的视野引导显示了照相机的视野范围，并且是只有当照相机光圈的高宽比和透视分辨率一样的情况下才起渲染作用。
The film gate view guide indicates the area of the camera's view that renders only if the aspect ratios of the camera aperture and rendering resolution are the same.
现在你已经了解了这两个参数——快门速度和光圈大小，他们从本质上来说有同一个功能：控制进入相机的光线总量。
So you have these two parameters, shutter speed and aperture size, both of which do essentially the same thing: control how much light gets in.
光圈非常重要，因为它决定你的相机在不同照明条件下拍摄速度有多快，以及拍摄时的感光度(iso)为多少。
This is extremely important, because it determines how fast and at what light sensitivity (ISO) your camera can shoot in different lighting conditions.
注意相机可能会自动将快门速度设到1/125，光圈设到F11。
Notice that perhaps your camera will select, on its own, a shutter speed of 1/125 with an aperture of F11.
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。
Putting the dial on "s" tells your camera "I am deciding the shutter speed, you set the aperture for me."
在自动模式和程序模式之下，相机一般会选择一个不大不小的光圈和快门来进行适当的曝光，但这样既不会有任何极端参数，也就更失去了创造的机会。
In auto mode and program mode, the camera usually chooses middle-of-the-road aperture and shutter Settings, getting a good exposure but avoiding any extremes-and any creativity as well.
虹膜的工作机理如同照相机的光圈。天气晴朗时，虹膜将会变小以限制通光量。
The iris works just like the iris on a camera; if it's a bright day, and lots of light tries to enter the eye, then the iris will close down limiting the amount of light that can enter.
这些标记称为EXIF元数据，是为了说明照片的曝光度和光圈设定，有的相机还会显示GPS信息，当然，还有拍照的时间和日期。
These tags, called EXIF metadata, specify things like the exposure and f-stop settings, gps information if your camera has it, and, of course, the time and date the photo was taken.
这种生物头上伸出带刺的肢体，扁圆形的嘴巴就像照相机的光圈一样开开合合。
But the fossil creatures had spiny limbs sprouting from their heads and circular, plated mouths, which opened and closed like the diaphragm of a camera.
你能教我怎么调照相机的光圈吗？
现在你可以在F4光圈下用任何快门速度甚至相机最快的快门速度拍摄，取得你想要的拍摄效果：背景模糊的人物像。
Now, you can go ahead and shoot at F4 with shutter speeds up to the Max the camera has available. And you still achieve that precious look that we all want; a portrait with a blurred background.
就像镜头有一个光圈范围，你的相机也有一个快门速度的范围。
Just like a lens has a range of apertures, your camera has a range of shutter speeds.
你设置光圈(用于指定有多少光进入照相机镜头)——你想照一幅漂亮、浅景深或广角的照片吗？
You set the aperture, which dictates how much light comes into the camera-do you want a nice, shallow depth-of-the-field, or everything in focus?
这门课同样适合那些懂得IS O感光度、光圈、快门速度、白平衡等摄影知识并能用自己的数码单反或桥梁相机设置这些参数的同学。
It is ideal for those who have an understanding of ISO, aperture, shutter speed, white balance and how to change these on your digital SLR or bridge camera.
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.
然而像我们这些单反相机的使用者在有足够多的经验之前，总是很难理解一个大光圈的50mm镜头是多么的实用。
What some of us DSLR users don't realize until we've grown enough is just how wondrous and useful a good 50mm lens with a wide aperture is.
f制光圈(或称光圈)决定相机的景深(对焦区域)以及有多少光能通过镜头到达传感器。
The f-stop, otherwise known as the aperture, determines your depth of field (the area in focus) and how much light can pass through the lens to reach the sensor.
装上镜头后(不论相机是开着还是关闭的)，相机便会获知镜头特征，包括最大光圈，哪一组对焦参数等。
When you mount a lens (whether the camera is on or off), the camera interrogates the lens for its characteristics, including maximum aperture, which one of the focusing parameters.
这只适用于那些使用全功能相机的人，但是尽可能的使用最大光圈能够确保最大亮度，来让焦点尽量聚焦在前景上。
This will only apply to those using full cameras, but using the widest aperture available to you will ensure the maximum level of light, allowing the majority of focus on the foreground.
由于光圈控制着进入相机的光线总量，也就是说曝光强弱可以由光圈来控制。
Since the amount of light reaching the camera is dependent on the aperture, the overall exposure is altered by changes in aperture.
即使在光圈优先或快门优先模式下，当你调整设定，相机会自动调整另一个设定。
Even in aperture or shutter priority modes, if you attempt the change one setting, the camera will change the other Settings to compensate.
在现在的照相机中，这类似于光圈。
实际上，使用数码相机提供的预设模式时，相机会从光圈和快门速度两方面进行调节，以使通光量翻倍。
In fact, using digital cameras provide default mode, phase opportunities from two aspects of the aperture and shutter speed on the adjustment, in order to make the amount of light, doubled.
用小光圈，仔细调整相机位置。
用小光圈，仔细调整相机位置。
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