[ming791222]

我用a16+500d,每次我收細光圈5.6-8.0影,張相好易變黃.,用2.8-4光圈又正常番.,想問下係我部機問題or支鏡有問題???

[Obi-Wan]

係光管下影係會發生呢d怪現象，係戶外應該少見。

[reflexboy]

二樓錮位，請你花多少少時間諗吓你講嗰樣野同樓主講嘅問題概念上有無衝突？

[ncychan]

係光管下影係會發生呢d怪現象，係戶外應該少見。 x 2 Agreed and support.

I experienced it before ..... green blue and purple.... on my previous A16 lens. We all know "光管" is a kind of "mixed" light light source with uneven wavelengths and frequencies. that it usually affects your white balance result.

To ensure it is NOT the lens and camera problem, pls test it under the unique light source --- sun light.

Cheers.

[Obi-Wan]

ncychan

Your response is much more helpful than the reflexkid. ^_^

Reflex Kid, would you mind give your opinion?

[louis277]

Obi wan,

你又想騎劫他人建議為己用?你之前嘅意見仲容易誤導人而且答非所問!

都係俾番有識之士答啦,無謂自己獻丑!!

[Obi-Wan]

louis277

u can give your constructive opinion here.

Would you mind giving me an example who "你又想騎劫他人建議為己用?你之前嘅意見仲容易誤導人而且答非所問!"

Correct me if I were wrong!

[reflexboy]

ncychan,在下不能同意你嘅講法!

首先,單單光管來講,唔係你所講嘅混合顏色先源. 然而唔同光管有唔同色溫,但絕對唔會係咩混合顏色光源!除咗同一場地同時裝上不同色溫光管.

另外,香港市電係220V/60Hz. 所以其實光管每秒係閃動緊60次. 如果拍攝時快門用1／60sec或以上,就有極大機會捕捉到閃動同閃動間黑暗的一刻.呢個係顏色變化"其實係短暫同局部係underexpose"原因!係常識而唔係怪現象!

我先前講過用1／60sec上快門會出現呢個有人形容為"怪現象"! 而所有人都知,得到正確曝光要光圈同快門配合,如果拍攝場地正確曝光可以用1／125sec F2.8得到,咁樣用1／125sec f2.8捕捉到嘅"怪現象",用1／30sec f5.6(收細光圈)就可以消除! 呢樣野嘅概念,同樓主所問嘅剛好相反!

清楚末？

nycchan,你agree同support錯咗一啲野！

溫生,呢啲係常識!唔係怪現象!你需要學攝影abc,同時加埋常識abc! 

[JSmith]

光管" is a kind of "mixed" light light source with uneven wavelengths and frequencies. that it usually affects your white balance result.
======================================================

有乜嘢light source可以做到single wavelength？

[Obi-Wan]

JSmith
"有乜嘢light source可以做到single wavelength？ " Sodium lamp using the sodium-D line is monochromatic (this sodium lamp is not the same as the common sodium lamp which consists of sodium vapor and neon vapor)

reflex kid
experiment with your own lens under fluorescent lamp with different A to verify whether the color change is the simplest answer, no need to waste time to argue

[JSmith]

大師

你估我唔識乜嘢係monochromatic light source咩？

「光管" is a kind of "mixed" light light source with uneven wavelengths and frequencies. that it usually affects your white balance result. 」

以上呢句嘢係完全錯concept 同 misleading

[reflexboy]

大屍,我講嘅已經清楚到不能再清楚！不如你解釋吓你自已二樓嗰番話係咩原因啦！如果唔係就請勿扮高深同作出一啲誤導嘅言論！

[ncychan]

To all,

If I was wrong. never mind.

If 光管 is a constant light source with color temp. shift, pls take fine pictures and exam the white balance result by yourself.

BTW, have you asked people all the lighting in the studio are not 光管 but using light bulb ?

Cheers. : )

[reflexboy]

Obi Wan, 你呢種人真係不負責任！每次講完啲誤導言論就一走了之！雖然呢道有識之仕吾少，佢地百毒不侵！但新人數目卻比資深嘅多好多好多倍！ 所以你吾好再發出啲誤導言論！真係吾想見到一個一個閣下嘅番版喺道出現！

吾識可以問，誤導就最可恥！你家陣知點解我咩都畀你講先啦！

[cy001]

Reflexboy

i understand what are u talking about. It just very easy to see this effect when u take a phot on yr LCD TV. But the color temp change to yellow when 收細光圈. i'm not understand. is it real?