How to take a great picture - Carolina Molinari

翻译人员: xuanyu shi 校对人员: Ying Yang

Hmmm, that's not what we want, is it?

嗯......那并不是我们想要的，不是么？

Today's digital cameras do a lot for us,

如今的数码相机可以为我们做很多事，

but there's no replacement for the human eye.

但是人的眼睛是无法被取代的。

It's important to learn

学习相机如何利用光 来创建出一个图像是很重要的，

how cameras work with light to create an image,

that way we'll know what's going on

这样我们就知道捕捉一个时刻的时候

when it's time to capture a moment.

发生了什么事。

There are three variables

有三个变量可以判断你是否用了了适量的光

that determine if you're getting the right amount of light

来正确的曝光。

for the correct exposure.

With a manual camera,

操作一个手动相机的时候，

we're able to change any of the variable ourselves.

我们可以自己调整任何的变量。

Different settings can result in really different pictures.

不同的设置会导致很不一样质量的照片。

Let's look at the process together.

让我们来一起看一看这个过程。

First, see this here?

首先， 看见这里了么？

This is the aperture.

这就是光圈。

It's the hole that light passes through.

这是一个让光穿过的孔。

If we make the aperture big,

如何我们让光圈变大，

we'll have more light, true,

那么我们将会有更多的光，事实也是如此。

but the sharpness of your photo will decrease

但是你的照片的清晰度会

very quickly from your focus point,

从你的焦点开始降低得很快， 包括前面和后面的景物。

backward and forward.

This is what we call shallow depth of field.

这就是我们所说的浅的景深。

If we have a very small aperture,

如果我们的光圈很小，

we'll have less light but a deeper depth of field.

那么我们将有很少的光，但是更深的景深。

For portraits, it can be nice to have a sharp figure

对于肖像拍摄来说,这是不错的，

separate from a somewhat blurry background

让人的身影和模糊的背影区别开

so I would suggest a large aperture.

所以，我会建议肖像拍摄用大的光圈。

Aperture is measured in f-stops.

光圈是用 f 值来衡量的，

This can get a little confusing

这可能有点让人摸不着头脑

because lower numbers mean bigger apertures

因为数字越小意味着光圈越大，

and higher numbers mean smaller apertures.

而数字越大就意味着光圈越小。

Next, there's shutter speed to think about.

下面，让我们来研究一下快门速度。

The shutter acts like a curtain

快门就像一个窗帘盖着光传感器,

that covers the sensor,

and it only opens when you release the shutter button.

而且它只在你释放快门按钮的时候才会打开。

If we want less light,

如果我们想要少一点的光,

we open the shutter for a shorter time.

我们要快一点松开快门按钮。

If we want more light,

如果我们想要多一点的光，

we open it for a longer time,

我们打开它的时间更长。

but we run the risk of getting

但是我们也有可能会拍出模糊的运动画面。

a motion-blurred picture.

The speed is measured in seconds

速度是以秒和秒的几分之几来测量的。

and fractions of seconds.

For shooting sports or anything with a lot of movement,

在拍摄运动类或者一些动作的时候，

we'll need faster speeds.

我们需要快一点的速度。

拍摄很棒的夜景的时候，

For taking awesome night landscapes,

longer exposures will be better,

长一点的曝光时间会更好，

but we'll need a tripod to steady the shot

但是我们需要一个稳定的三脚架，

and prevent motion blur.

来稳定拍摄以防动态模糊。

Another cool thing we can do with light exposures

另一个关于曝光做起来很酷的事情是光绘，

is light painting,

drawing in the dark with a torch

用手电筒或者手机的光在黑空中画画。

or the light of a cell phone.

Lastly, ISO sensitivity controls

最后要说的是 ISO 感光度，

它控制了光传感器对光的敏感度。

how sensitive the sensor is to light.

If we use low sensitivity,

如果我们使用低敏感度，

we'll need more light to register a photo.

我们需要更多的光线来记录照片

With a higher sensitivity,

而很高敏感度，

we'll be able to get a picture

with less available light.

我们可以用更少的光来拍摄一张照片。

100 ISO is a low sensitivity,

100 ISO 是一个光敏感度低的值,

while 6400 ISO is a high one.

而6400 ISO是一个较高的敏感度的值。

If we increase sensitivity,

如果我们增加灵敏度,

we'll be able to use faster speeds

我们可以用更快的速度

and smaller apertures,

和较小的光圈,

but we'll get noisier images.

但我们会得到噪声图像。

Good thing we have something to tell us

幸运的是我们有一样东西

if we're getting the correct amount of light

可以告诉我们是否得到正确的光量

to get a good exposure,

和良好的曝光量，

the light meter.

那就是测光表。

Sound good to you?

听起来不错吧?

Now it's time to get out there

现在是时候走出去 练习如何在不同的条件下拍照了，

and practice taking pictures

under different conditions,

so you know what to do

那么在任何时候 你都会知道怎样可以拍出最好看的照片。

any time you want to take the best picture.