100:00:00,000 --> 00:00:16,859here

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here in a photo studio today discussing
the principles of TTL flash using the

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Profoto off-camera flash system that you
see behind me a five-foot RFI octa it's

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fitted with a pro photo B 12 the model
aight battery-operated system right and

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I got TTL control over it if you see
that size of light especially in a

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studio historically you would say that's
a manual light I have to go over and

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adjust that late it's got manual
controls only but the beauty of the

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Profoto system is not only it's got this
tremendous array of lightsabers it also

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has now the new technology of TTL

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able to stay here at the camera with an
air remote and talk to that light

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alright relax for second PTL through the
lens it means basically that the camera

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is judging flash exposure relative to
what the camera actually sees so the

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only information that is being
translated actively into judging the

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exposure the flash is in fact the frame
of the camera the camera discerns the

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information that it views through the
lens and then uses that to factor the

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flash exposure

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there are two flashes that are involved
in every exposure one is called the pre

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flash which emanates from the flash
prior to the actual exposure what that

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does is it limits the field of view of
the camera and gives the cameras brain

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something that you on information you
know about color and reflectivity and

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all that kind of stuff that the camera
needs to ascertain to tell the flash how

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to behave so what the camera and the
flasher doing basically is having a

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conversation the pre flash pops out and
the camera judges that and then it sends

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a single that to the flash this is how
much light to put out or how little late

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to put out it is actually a conversation
that the two units are having here's

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what you do with a location is like
peeling an onion right you don't leave

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until you get all the layers of it done
and with a TTL system like this it's

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perfectly tailored to do that kind of
maneuvering because you are moving fast

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and the system keeps up with you here we
go

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group a channel 11 light it's with a OCF
umbrella that got a diffuser rabbi is

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kinda like an umbrella box some folks
would refer to this like we got there ok

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and I know why do TTL first frame right
out the box gets me in the ballpark this

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is perfect rain I don't really have to
do too much

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which is nice you know I can concentrate
on the aesthetics I can concentrate on

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the emotion I can concentrate on paying
attention to my subject alright so kind

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of proof positive I just went from five
point six on the fly to 1.4 and there

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was no change in the exposure me know
it's obviously a change in the way the

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light handled itself a remote took that
information from the camera decoded it

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went over to light and a light responded
so I went to High Point 62 F 1.4 on the

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fly

結果 (中文) 1:

100:00:00，000--> 00:00:16，859在这里一家照相馆在今天讨论原则的 TTL 闪光使用200:00:16，859--> 00:00:22，850Profoto 关闭相机闪光系统，你看到我身后五脚 RFI octa 它是300:00:22，850--> 00:00:27，439装有临写真 B 12 模型和老子做电池系统正确和400:00:27，439--> 00:00:31，380我得到了 TTL 控制它，如果你看到这种大小的光特别是在500:00:31，380--> 00:00:35，649工作室历史上你会说这就是手动的光，我不得不复习和600:00:35，649--> 00:00:39，520调整晚有手动只有美的控件700:00:39，520--> 00:00:44，469Profoto 系统不是只有有了这巨大的阵列的光剑它也800:00:44，469--> 00:00:47，950现在有 TTL 的新技术900:00:47，950--> 00:00:52，120能在这里呆着相机的镜头与空气远程和说话那光1000:00:52，120--> 00:01:01，020通过第二个 PTL 好放松这基本上意味着，相机的镜头1100:01:01，020--> 00:01:06，220判断闪光灯的曝光量，相对于相机其实看到这样1200:01:06，220--> 00:01:09，970只被的信息积极转化为判断1300:01:09，970--> 00:01:15，420闪光曝光其实是框架相机的镜头识别1400:01:15，420--> 00:01:19，790它通过视图的信息镜头，然后使用的因素1500:01:19，790--> 00:01:22，580闪光灯的曝光量1600:01:22，580--> 00:01:28，480有涉及的两个闪烁每一次暴露在一个叫做预1700:01:28，480--> 00:01:34，600来自闪光灯的闪光先实际暴露什么，1800:01:34，600--> 00:01:39，250也就是它限制了的视野相机和让相机的大脑1900:01:39，250--> 00:01:44，120东西，你的信息你了解颜色和反射率和2000:01:44，120--> 00:01:48，170所有的什么样的东西，相机需要确定告诉 flash 如何2100:01:48，170--> 00:01:52，260所以表现什么相机和有闪光器基本上做2200:01:52，260--> 00:01:58，390谈话前 flash 弹出和相机的法官，然后发送2300:01:58，390--> 00:02:03，710单个的闪光这是如何多光熄灭或多少晚2400:02:03，710--> 00:02:09，860提出它是实际上的谈话这两个单位都有在这里了2500:02:09，860--> 00:02:13，550你的地理位置和要的做的是剥洋葱吧你不要离开2600:02:13，550--> 00:02:17，770直到你得到的这件事的所有图层与 TTL 就是像这种制度2700:02:17，770--> 00:02:22，270量身做那种因为你正在快速机动2800:02:22，270--> 00:02:25，160和系统仍然能够保持与你在这里我们去2900:02:25，160--> 00:02:33，440组的 11 光正是 OCF 通道得到了扩压器拉比的伞3000:02:33，440--> 00:02:41，880有点像一把伞框中有些人像我们到了那里好指这3100:02:41，880--> 00:02:49，450我知道为什么做 TTL 第一帧右出来框中获取我在棒球场这3200:02:49，450--> 00:02:53，780是我真的没有对完美雨做的太多3300:02:53，780--> 00:02:58，400这是好你知道我可以集中精力在美学上，我可以集中精力3400:02:58，400--> 00:03:04，610我可以集中精力付出的情感对我好，善良的主题关注3500:03:04，610--> 00:03:12，680确凿的证据的我只是去从五六飞指向 1.4 和那里3600:03:12，680--> 00:03:16，620我知道暴露没有变化这显然是一个变化的方式3700:03:16，620--> 00:03:23，080光处理本身远程了，从相机信息解码它3800:03:23，080--> 00:03:29，580走到光和光反应所以去高点 62 F 1.43900:03:29，580--> 00:03:29，820飞

結果 (中文) 3:

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在今天的摄影工作室讨论
原则TTL闪光使用

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保富了相机的闪光系统，你
看到我身后一五英尺的
RFI八
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配备专业照片B 12模型
到电池操作系统是

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我得到了它的TTL控制如果你看到
，光是大小在一个

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工作室历史上你会说的
手动光我要去

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调整那晚有手动
控件只不过美丽的

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保富系统不仅有这
巨大阵列的光剑也

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现在TTL

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能够留在相机与
空中远程跟光

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好放松二PTL通过
镜头是基本的相机

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是判断闪光曝光相对
什么摄像头看到这样的

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只有信息被翻译成
积极判断

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曝光Flash实际上是框架
相机的摄像头识别

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信息，视图通过
镜头再使用因素15


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闪光曝光

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有两闪烁，参与
每次曝光一个叫预

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Flash闪存
源自什么，

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是限制的
相机视场的相机给大脑

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一些你的信息你
实际曝光之前了解颜色、反射率和

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所有这一类的东西，相机
需要确定告诉Flash如何

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表现什么相机和
闪光做的基本上是有

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谈话的预闪出去，
相机的法官，并将

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单，这是多么
多闪光灯光熄灭或多少晚

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扑灭它实际上是一种对话
，两家单位在这里的

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你的位置是
剥洋葱吧你不离开

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直到你把所有的层做
与TTL系统这样的

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完全适合做的，因为你是
机动快速运动

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和系统保持了你在这里我们
去

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组通道11光是和OCF
伞有扩散器拉比是

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有点像雨伞盒有些人
会参考这个像我们有好的

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我知道为什么TTL第一框右
开箱给我看球这

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是完美的雨我真的没有
做太多的

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这很好，你知道我可以集中
在美学上我可以集中精力

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情感我可以集中支付
注意我的主题好这样

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证明积极的我就从五
点六在飞到1.4有36


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在暴露我
它显然是这样

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变化无变化光处理本身远程把
信息从相机解码

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去光和光反应
所以我去高点62 F 1.4在

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飞