100:00:00,000 --> 00:00:03,030one o

1
00:00:00,000 --> 00:00:03,030
one of the terms we've mentioned and
that you're gonna hear constantly

2
00:00:03,030 --> 00:00:08,590
throughout your photographic career is a
. or in short a stock of light what is a

3
00:00:08,590 --> 00:00:11,690
stop you're gonna be doing this at an
especially when we talk about exposure

4
00:00:11,690 --> 00:00:15,839
well as stop is simply a relative
measurement of light it means either

5
00:00:15,839 --> 00:00:19,699
double or half the amount of light but
what is that relative to what are we

6
00:00:19,699 --> 00:00:23,859
doubling what are we having well if I
had to say a stop as relative to

7
00:00:23,859 --> 00:00:27,279
basically whatever we currently have and
where we want to go and relative to

8
00:00:27,279 --> 00:00:31,830
everything well that makes absolutely no
sense and is a terrible explanation and

9
00:00:31,830 --> 00:00:35,750
if I were to ask you a question will
tell me this how about you tell me how

10
00:00:35,750 --> 00:00:40,059
much light is actually in this scene if
you're starting a photography what would

11
00:00:40,059 --> 00:00:43,430
you say to that if they tell me the
exposure value of this scene we're gonna

12
00:00:43,430 --> 00:00:47,800
go oh there's sixty five gallons of
light in the senior there's two hundred

13
00:00:47,800 --> 00:00:52,340
and forty two leaders like this in those
terms they absolutely no sense and there

14
00:00:52,340 --> 00:00:55,750
really aren't any specific terms of
measurement for measuring the amount of

15
00:00:55,750 --> 00:00:59,300
lightness scene well actually you know
what I live there are we can measure in

16
00:00:59,300 --> 00:01:03,120
terms of lumens which is again kinda
confusing we can also measure in terms

17
00:01:03,120 --> 00:01:08,570
of V's or exposure value but it's hard
to tell you that this room has an Evo 8

18
00:01:08,570 --> 00:01:14,250
or virus a shooting outdoors and sunny
weather has an Evo 15 what would that

19
00:01:14,250 --> 00:01:17,049
mean that would mean absolutely nothing
to someone just starting out in

20
00:01:17,049 --> 00:01:21,880
photography so instead we use terms like
a stop so estaba simply gonna be

21
00:01:21,880 --> 00:01:25,700
describing where we're at with our
current exposure and where we need to go

22
00:01:25,700 --> 00:01:29,100
so to show you all and hammer the point
home we're gonna be using our same

23
00:01:29,100 --> 00:01:34,500
exposure triangle real-world county will
kisses are visual analogy not real world

24
00:01:34,500 --> 00:01:39,229
and what I want you to remember is that
will stop is either double or half the

25
00:01:39,229 --> 00:01:42,549
amount of brightness but we have three
ways to control that so let's talk about

26
00:01:42,549 --> 00:01:46,180
it let's go ahead and first and what am
i doing just open up my faucet all the

27
00:01:46,180 --> 00:01:50,049
way to my wireless adapter what we're
gonna say is that this faucet is our

28
00:01:50,049 --> 00:01:50,560
land

29
00:01:50,560 --> 00:01:54,649
and has a maximum aperture of F 2.8
that's why did they can go so this is as

30
00:01:54,649 --> 00:01:58,340
much light as we're gonna get nowhere to
do is go ahead and bring my feeling hurt

31
00:01:58,340 --> 00:02:06,460
up in and let's do this and any use my
time and I want to get back to that ok

32
00:02:06,460 --> 00:02:11,900
so what I want to do is I want to add a
second shutter speed and I'm asked my

33
00:02:11,900 --> 00:02:18,120
after a 2.8 and i 100 ISO will find a
start this and i three seconds we know

34
00:02:18,120 --> 00:02:21,540
from a for that basically we're only
going to get halfway three seconds we

35
00:02:21,540 --> 00:02:26,890
fill the cup half way up now filled
halfway this means that we're one stop

36
00:02:26,890 --> 00:02:32,940
underexposed or I need to brighten my
image by one stop at the same thing so

37
00:02:32,940 --> 00:02:36,940
we have one thousand or close to what I
need to do is that three second instead

38
00:02:36,940 --> 00:02:43,610
of using a free second I would need to
double or increase the charity by 1000

39
00:02:43,610 --> 00:02:46,380
brightness and now I mean that I W 26
seconds

40
00:02:46,380 --> 00:02:50,420
those where the reset that we're gonna
go again six seconds and we're going to

41
00:02:50,420 --> 00:02:57,830
double it we're gonna get all the way
filled up and there we go

42
00:02:57,830 --> 00:03:02,830
ok so at six seconds we doubled the
shutter speed we increase the shutter

43
00:03:02,830 --> 00:03:06,350
speed by one stop to get one stop
brighter to get to our proper exposure

44
00:03:06,350 --> 00:03:10,440
well same thing with the after we can
adjust the apt to give us one stop

45
00:03:10,440 --> 00:03:14,200
brighter one-stop darker one more thing
I want to go over one last thing what if

46
00:03:14,200 --> 00:03:17,750
I leave it for a shutter speed of let's
say 12 seconds

47
00:03:17,750 --> 00:03:22,030
well at 12 seconds if this was again in
the same scenario what ends up happening

48
00:03:22,030 --> 00:03:27,620
in our to guess we're gonna end up
overbilling the cup so if I over the

49
00:03:27,620 --> 00:03:31,300
filling up in this isn't actually go up
this point but overfill I could say that

50
00:03:31,300 --> 00:03:35,100
I need to go with one stop starter so we
can adjust the shutter speed and cut it

51
00:03:35,100 --> 00:03:39,100
in half to get back to that point so
this is kind of our overexposed images

52
00:03:39,100 --> 00:03:45,600
now if we want to our after ok so after
let's go ahead and open the faucet up to

53
00:03:45,600 --> 00:03:49,540
I'm gonna say this is full so this is a
hefty pointed at their widest open after

54
00:03:49,540 --> 00:03:54,770
let's say this is around f4 so that's
one thousand darker or half the amount

55
00:03:54,770 --> 00:03:58,880
of light as F 2.8 ok so now let's go
ahead and we're going to do their same

56
00:03:58,880 --> 00:04:04,269
cup and do here is let's use at six
second shutter speed again and let's see

57
00:04:04,269 --> 00:04:07,130
where we get a head start

58
00:04:07,130 --> 00:04:13,989
we should get roughly around half of
that was indeed and we do 525 second and

59
00:04:13,989 --> 00:04:19,260
we basically got half of our exposures
so you can see here so it's not exactly

60
00:04:19,260 --> 00:04:23,250
around a little bit but we got basically
have to where we need to go so when you

61
00:04:23,250 --> 00:04:27,930
do it again we need to increase the
aperture by one stopped and brightness

62
00:04:27,930 --> 00:04:32,050
and I double it so again we would go
back up to full light ok so you can see

63
00:04:32,050 --> 00:04:35,010
how these are two different until
they're ready in controlling the doctor

64
00:04:35,010 --> 00:04:39,570
his brightness now let's say this is
another example and we're gonna say that

65
00:04:39,570 --> 00:04:43,360
for compositional purposes I'm shooting
water and trying to get that whiskey

66
00:04:43,360 --> 00:04:48,310
water effect and I find that out 1.5
seconds that gives me the perfect look

67
00:04:48,310 --> 00:04:52,110
in the water its not showing too much
motion it's not freezing it too much is

68
00:04:52,110 --> 00:04:55,530
just right so I need to keep my shutter
speed 1.5 seconds

69
00:04:55,530 --> 00:04:59,930
let's also say that we're at F 2.8 so we
maximize the amount of light coming

70
00:04:59,930 --> 00:05:00,870
through we can

71
00:05:00,870 --> 00:05:05,280
going anymore now I need to go with 1.5
seconds my study because that for

72
00:05:05,280 --> 00:05:09,110
compositional purposes I want to change
it but the problem is that well at iso

73
00:05:09,110 --> 00:05:16,100
100 if I go for 1.5 seconds we get only
a quarter of the cup filled out so we're

74
00:05:16,100 --> 00:05:21,100
two stops under expose well same thing
about go to ISO 200 with his 1,000th

75
00:05:21,100 --> 00:05:27,390
brighter than ISO 100 at 1.5 seconds we
only get half way so we're one stop

76
00:05:27,390 --> 00:05:32,000
under exposed so what I need to do is
going to stop and I go to ISO 400 and I

結果 (中文) 3:

1
00:00: 00000——> 00:00:03030
条件之一，我们已经提到，
，你会经常听到

2
00:00:03030——> 00:00:08590
贯穿你的摄影生涯是一个
。或短的股票光什么是

3
00:00:08590——> 00:00:11690
停止你要做这一
尤其是当我们谈论曝光

4
00:00:11690——> 00:00:15839
以及停止只是一个相对
测量光这意味着要么

5
00:00:15839——> 00:00:19699
双或半量轻而
什么是相对于我们

6
00:00:19699——> 00:00:23859
倍增我们吃什么好如果我
不得不说停止为相对于

7
00:00:23859——> 00:00:27279
基本不管我们目前和
去我们想去的地方，相对

8
00:00:27279——> 00:00:31830
一切都好，一点也不
感是一种可怕的解释和

9
00:00:31830——> 00:00:35750
如果我问你一个问题
告诉我你告诉我怎么

10
00:00:35750——> 00:00:40059
多光实际上是在这个场景中，如果你开始一个
摄影什么

11
00:00:40059——> 00:00:43430
你说如果他们告诉我
曝光值这样的场景我们会

12
00:00:43430——> 00:00:47800
走哦，还有在高中有二百

13
00:00:47800——> 00:00:52340
四零二领导人这样那些
方面他们是没有任何意义的，有

14
00:00:52340——> 00:00:55750
真的没有具体而言，
测量测量

15
00:00:55
轻量六零五加仑，750——> 00:00:59300
亮度场景其实你知道
我生活有可以测量

16
00:00:59300——> 00:01:03120
而言又是有点
流明迷惑我们也可以测量方面

17
00:01:03120——> 00:01:08570
V或曝光值，但是很难
告诉你，这个房间里有8

EVO 18
00:01:08570——> 00:01:14250
或病毒在户外拍摄，阳光明媚的
天气EVO 15会是什么样的

19
00:01:14250——> 00:01:17049
意味着意味着什么
人刚开始在

20
00:01:17049——> 00:01:21880
摄影所以我们使用术语
停止所以我只会

21
00:01:21880——> 00:01:25700
描述我们在哪里我们的
当前曝光和我们要去的地方

22
00:01:25700——> 00:01:29100
所以告诉你所有和锤点
回家，我们会用我们的一

23
00:01:29100——> 00:01:34500
曝光三角实际县将视觉比喻不真实的世界

24
00:01:34500——> 00:01:39229
和我想让你记住的是，
将不再是双或半

25
00:01:39229——> 00:01:42549
量的亮度，但我们有三
是
吻的方式来控制，所以让我们来谈谈

26
00:01:42549——> 00:01:46180
它吧，第一，什么是
我做的只是打开我的水龙头，所有的

27
00:01:46180——> 00:01:50049
方式我的无线适配器我们
要说的是，这个水龙头是我们

28
00:01:50049——> 00:01:50560
土地

29
00:01:50560——> 00:01:54649
有
最大光圈F 2.8这就是为什么他们可以去，这是

30
00:01:54649——> 00:01:58340
多光，我们会无处
做的是去把我的情伤

31
00:01:58340——> 00:02:06460
起来让我们做这个，任何使用我的时间，我想
回去吧

32
00:02:06460——> 00:02:11900
所以我想做的是我想添加一个
秒的快门速度，我问我的

33
00:02:11，900——> 00:02:18120
后一2.8我100 ISO会找到一个
开始我三秒，我们知道

34
00:02:18120——> 00:02:21540
从，基本上我们只
要走三秒我们

35
00:02:21540——> 00:02:26890
填满杯子一半现在满
中途这意味着我们的一站

36
00:02:26890——> 00:02:32940
曝光不足或我需要照亮我的
图像由一个停在一件事

37
00:02:32940——> 00:02:36940
我们一千或接近我
需要做的是三秒而不是38


00:02:36940——> 00:02:43610
使用免费二我需要
慈善双或增加1000

39
00:02:43610——> 00:02:46380
亮度和现在我的意思是，我26
秒

40
00:02:46380——> 00:02:50420
那些复位，我们要
走了六秒，我们要

41
00:02:50420——> 00:02:57830
双它我们会走
填满了，我们走

42
00:02:57830——> 00:03:02830
好所以在六秒的快门速度，我们
我们加倍提高快门

43
00:03:02830——> 00:03:06350
速度一停下来一站
亮到我们合适的曝光

44
00：03:06350——> 00:03:10440
好相同的后我们可以
调整容易给我们一站

45
00:03:10440——> 00:03:14200
光明的一站式暗一点
我想的最后一件事如果

46
00:03:14200——> 00:03:17750
我让一让快门速度12秒的
说

47
00:03:17750——> 00:03:22030
在12秒，如果这是一
相同的情况下，最终发生的

48
00:03:22030——> 00:03:27620
我猜我们会
超额杯，所以如果我在

49
00:03:27620——> 00:03:31300
填补这实际上不是去
这一点但过量我可以说

50
00:03:31300——> 00:03:35100
我需要去一个起动器停止所以我们
可以调整快门速度，把它

51
00:03:35，100——> 00:03:39100
半回到这一点，这是一种
我们曝光过度的图像

52
00:03:39100——> 00:03:45600
现在如果我们想我们的后
好后我们继续打开水龙头到

53
00:03:45600——> 00:03:49540
我要说这是这是一个
高额指出在他们的广泛开放后

54
00:03:49540——> 00:03:54770
让我们说这是在这样的
F4一千暗或半量

55
00:03:54770——> 00:03:58880
光为F 2.8好吧，现在让我们去
前进，我们要做同样的

56
00:03:58880——> 00:04:04269
杯和在这里做的是让我们用六秒的快门速度
再次让我们看到

57
00:04:04269——> 00:04:07130
我们得到的一头开始

58
00:04:07130——> 00:04:13989
应该有大约一半左右的
这确实是我们做的525秒和59


00:04:13989——> 00:04:19260
我们基本上有一半的风险
所以你可以在这里看到，这不完全是

60
00:04:19260——> 00:04:23250
绕一点但我们基本上
有我们要去的地方，当你

61
00:04:23250——> 00:04:27930
做一遍我们需要增加
孔径一停和亮度

62
00:04:27，930——> 00:04:32050
我加倍所以我们再次去
满光好，所以你可以看到

63
00:04:32050——> 00:04:35010
这些是不同的两个直到
他们控制医生

64
00:04:35010——> 00:04:39570
他的亮度现在准备说另一个例子是
我们会说

65
00:04:39570——> 00:04:43360
成分的目的，我拍摄
水试图把威士忌

66
00:04:43360——> 00:04:48310
水效果，我发现了1.5
秒，给了我完美的外观

67
00:04:48310——> 00:04:52110
在水没有表现出太多的
运动不是冻结太多是

68
00:04:52110——> 00:04:55530
刚刚好所以我需要保持我的快门速度1.5秒


69
00:04:55530——> 00:04:59930
让我们也说我们在F 2.8所以我们
最大的光来

70
00:04:59930量——> 00:05:00870
通过我们可以

71
00:05:00870——> 00:05:05280
去了现在我要和1.5
秒我的研究，因为

72
00:05:05280——> 00:05:09110
成分的目的，我想改变
它但问题是，在ISO 73


00:05:09110——> 00:05:16100
100如果我去1。5秒，我们只有
1/4杯填写，所以我们

74
00:05:16100——> 00:05:21100
两站下井一样的东西
暴露去ISO 200和他的第一千

75
00:05:21100——> 00:05:27390
比ISO 100在1.5秒，我们
只获得一半那么我们的一站

76
00:05:27390——> 00:05:32000
曝光不足，我需要做的是
要阻止我去ISO 400和我