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 文章主題 : 影火?
文章發表於 : 週日 20 1月 08 09:05:36 
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註冊時間: 週六 24 12月 05 01:20:48
文章: 2994
來自: 北海道
昨晚影 BBQ D 火影得麻麻地,有冇影火 O係 ISO、測光、光圈快門上O既經驗可以分享?

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 文章主題 : Re: 影火?
文章發表於 : 週日 20 1月 08 12:49:41 
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註冊時間: 週日 09 11月 03 03:42:29
文章: 12296
jason.lau 寫:
lofan0 寫:
昨晚影 BBQ D 火影得麻麻地,有冇影火 O係 ISO、測光、光圈快門上O既經驗可以分享?


The problem of your pictures is that the light meter system of your camera, no matter how advanced it is, does not understand zone system.

To put it simply, "Zone System" is placing your subject in its proper zone.

If you want to have a correct exposure of the people around the fire. Simply meter the people.

If the fire is your subject, you have to understand that fire is not at 18% grade. The center of fire is much brighter than the middle grade. probably around Zone VII to Zone VIII, or even XI. That means you need to overexpose 2 to 3, even 4 stops, in order to get the correct exposure. (But from your pictures, because the meter of your camera also considered the dark surrounding, you can see that the fire becomes all white, i.e. no information). That said, if you meter from your camera, you may need to underexpose, rather than overexpose.

I think the difficulty here is knowing the proper zone of fire. And certainly, fire in red color should be much darker than fire in blue color. And the color temperature is much lower too (that is another issue, not related to exposure). In short, why don't you just bracket it?
:lol: :lol:

Real pro explaintry....... :oops:

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 文章主題 :
文章發表於 : 週日 20 1月 08 18:43:53 
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註冊時間: 週日 30 5月 04 21:15:08
文章: 1286
Jason Adams! :D

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 文章主題 : Re: 影火?
文章發表於 : 週日 20 1月 08 19:06:51 
幹事
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註冊時間: 週三 12 11月 03 19:31:39
文章: 26328
來自: Hong Kong
jason.lau 寫:
If you want to have a correct exposure of the people around the fire. Simply meter the people.


咁 lee 層我都知,唔使當我上緊興趣班喎  :lol: :lol: :lol:

jason.lau 寫:
If the fire is your subject, you have to understand that fire is not at 18% grade.... In short, why don't you just bracket it? :lol: :lol:


I'm sorry.... I may have received a detailed elaboration of my question, but .... to be honest, I just want a solution..... say, where to meter, optimum shutter speed, etc. :lol: :lol: :lol:

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 文章主題 : Re: 影火?
文章發表於 : 週日 20 1月 08 21:14:37 
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註冊時間: 週三 12 11月 03 19:31:39
文章: 26328
來自: Hong Kong
jason.lau 寫:
Gave jor you answer la: bracket it ar ma! :lol: :lol:


Oh yes, for your reference, my mom is also a female! :lol: :lol: :lol:

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 文章主題 : Re: 影火?
文章發表於 : 週日 20 1月 08 23:40:03 
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註冊時間: 週三 04 1月 06 22:55:14
文章: 3990
lofan 寫:
jason.lau 寫:
Gave jor you answer la: bracket it ar ma! :lol: :lol:


Oh yes, for your reference, my mom is also a female! :lol: :lol: :lol:


LOL translation :D


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 文章主題 : Re: 影火?
文章發表於 : 週日 20 1月 08 23:43:34 
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註冊時間: 週四 27 11月 03 02:15:48
文章: 3194
來自: Moon Base Alpha
lofan 寫:
jason.lau 寫:
Gave jor you answer la: bracket it ar ma! :lol: :lol:


Oh yes, for your reference, my mom is also a female! :lol: :lol: :lol:


The simple way is meter the part that is brightest and yet you still want to retain some detail / texture and note the setting, meter the darkest area that you like to retain some detail and texture, and again note the setting.

Now if those 2 setting fall within 7 or 8 ( sometime 9 , depending on film ) stop ( say for same aperture, this translate to between say 1/15 vs 1/2000 ) then you can set your shutter at somethign sort of middle depending if you want a darker picture or lighter picture ( if its BBQ for me, I go for darker to retain the mood and also a faster shutter speed ). Now if they are so off as to be say more than the DR ( that 7 or 8 stop ) then you need to choose between those same setting, just that a darker picture would mean you would have less shadow detail ( film do not record ), lighter would just blown the highlight.

In general, my previous experience is BBQ fire is actually quite bright and one can safely shoot at 4.0 @ 1/125 on ISO 200 most of the time with an open flame. Cindering flame of course need more ..

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 文章主題 : Re: 影火?
文章發表於 : 週一 21 1月 08 09:56:22 
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註冊時間: 週三 12 11月 03 19:31:39
文章: 26328
來自: Hong Kong
FR 寫:
The simple way is meter the part that is brightest and yet you still want to retain some detail / texture and note the setting, meter the darkest area that you like to retain some detail and texture, and again note the setting.


Got it, I will have a try next time when I am with a church candle or a steady camp fire.

For the BBQ fire I just shot, the fire jumps up and down and up and down all the time (becasue of the butter as you might have noted from the pictures) so there might be serious difficulty in applying what I learnt from your sharing, but for a steady fire, I surely want to have a try and perhaps a report issued afterwards.

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 文章主題 : Re: 影火?
文章發表於 : 週一 21 1月 08 15:58:54 
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註冊時間: 週四 27 11月 03 02:15:48
文章: 3194
來自: Moon Base Alpha
lofan 寫:
Got it, I will have a try next time when I am with a church candle or a steady camp fire.

For the BBQ fire I just shot, the fire jumps up and down and up and down all the time (becasue of the butter as you might have noted from the pictures) so there might be serious difficulty in applying what I learnt from your sharing, but for a steady fire, I surely want to have a try and perhaps a report issued afterwards.


With such flame, just zoom the frame to the Flame and note the setting, since its almost entirely the flame, so its bright, then zoom off to the shadow ( made sure no flame is in the frame ) and meter the setting, and you had the 2 setting then, After that, its just deciding which middle of the ground setting for exposure ..

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 文章主題 :
文章發表於 : 週一 21 1月 08 20:35:35 
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註冊時間: 週日 09 11月 03 00:27:03
文章: 2502
lofan, 你要的答案會唔會係,點測火源,under 少少,跟住用你枝 Metz 燈大大力打落去? 咁咪又有火,你D學生/同事的樣又好清楚囉! :lol:

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 文章主題 :
文章發表於 : 週一 21 1月 08 21:24:27 
幹事
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註冊時間: 週三 12 11月 03 19:31:39
文章: 26328
來自: Hong Kong
Henry 寫:
lofan, 你要的答案會唔會係,點測火源,under 少少,跟住用你枝 Metz 燈大大力打落去? 咁咪又有火,你D學生/同事的樣又好清楚囉! :lol:


我試過加燈開 Rear sync ,在個 LCD 度睇落唔錯,
返到黎在大 mon 睇嚇到我 delete 都 delete 唔切,
又硬又冇哂 mood :evil:

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