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river
註冊: 2002-07-17
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閃光燈之應用? Post time: 1 月 23 日 |
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對於影相我係傻瓜一名,淨係識得用auto mode按制影相,最多識得揀埋用室內果個mode 同埋係 white balance到揀用"燈泡"定係"光管",所以好多係室內影出黎既相都好唔滿意,因為d色好似同本來差d距離。
所以我想問係咪係室內夠光的話就可以唔開閃光燈呢?因為用o左閃光燈d色好似仲假。
調去影"夜景"個mode,d色影出黎係咪又差d呢?係咪一唔係陽光底下影相就要揀呢個mode呢?
thx!!
(ps.我果部係pentax 330rs)
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hytong
註冊: 2002-12-18
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Re: 閃光燈之應用? Post time: 1 月 23 日 |
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用o左閃光燈d色好似仲假 is usually because
1. too much flash wash out subject details within flash distance
2. flash unit is too close to the lens, causing a flat lighting effect
If flash is inevitable, try using flash exposure compensation. If possible, find way to use off-camera diffused flash light source.
http://www.photo.net/making-photographs/light
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禧多郎
註冊: 2002-11-23
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Re: 閃光燈之應用? Post time: 1 月 23 日 |
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>所以好多係室內影出黎既相都好唔滿意,因為d色好似同本來差d距離。
係咪個人變o左藍精靈呢? 因為閃光燈色溫是6500K, 所以應將white balance 調至閃燈, 如果無閃燈white balance 就選用陰天mode, 出來的效果會是主體色準, 背景顏色卻會受環境色溫影響, 會出現橙調或綠調。
如果你想主體及背景都無走色現像, 就可用另一辦法:
強制停用閃燈、white balance調至光管或燈泡mode、用腳架
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hytong
註冊: 2002-12-18
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Re: 閃光燈之應用? Post time: 1 月 23 日 |
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if you are turning off the flash, remember to remind your subject not to move during the long exposure period.
White balance is about adjusting to the correct color temperature so that white objects appear as white. All electronic flash has the same color temperature as daylight which is 5500K. Note daylight here means a combination of sunlight (red-yellow lights directly from sun) and skylight (blueish light from blue sky) on a clear day.
e.g.
...
Blue skylight, open shade 12000K to 18000K
Hazy skylight, open shade 9000K to 12000K
Overcast sky 6500K to 7500K
Photographic daylight 5500K
Household halogen lamp 2200K to 3000K
200W blub 3000K
...
Source: Popular Photography / July 2001 p.99
if you are using the flash, another choice is to put gel filter in front of the flash unit so the light emitted has (more or less) the same color temperature as the ambient light
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