[PigPig0708]

小弟用MK2+50mm1.2L鏡, 但當係室內較大ISO就發生相中既問題(3分1相片變了茶色).
當我用其他鏡頭就冇問題

請問師兄有乜高見?

[Connoisseur]

Where's your pic?

[PigPig0708]

我搵唔到途經post張相.....

[rlwk]

http://www.dcfever.com/forum/read.php?f=12&i=82804&t=82804

[h0001244]

The problem comes from the fluorescent light not the lens and camera problem.

This is physics problem. The fluorescent light is emitting a pulse of light at the frequency of 50Hz (same with electricity supply). If your shutter speed is faster the 1/2 of that frequency (ie. 1/25s), then you get freeze the light pulse. If your shutter speed is slower than 1/25s, then you can get the full pulse of that light and no more 相片變了茶色..

If you are taking photo in indoor of incandescent lamp, then you would have such problem as it is a continuous wave form.

Try yourself

[PigPig0708]

http://s1051.photobucket.com/albums/s433/PigPig0708/?action=view¤t=IMG_3436.jpg

[PigPig0708]

請各位c hing指教

[小小生]

如果室內用光管照明,快門快過1/50秒就會有問題

[PigPig0708]

c hing是否光管以外既光源就無呢個限制?

[h0001244]

if it is continuous light wave as mentioned above, then it won't appear your problem

[Connoisseur]

這個link給你參考：

http://www.mobile01.com/topicdetail.php?f=244&t=2809245&p=1

小心50L用了超大光圈搞到快門太快，部相機不經意地變o左光源的頻閃儀(stroboscope)

[PigPig0708]

多謝各位c hing 指教.

我仲想問
1) 是否所有單反機都有這個情形
2)是否用閃光燈可解決問題
3)除了較慢快門, 別無他法?
4) 什麼是光源的頻閃儀(stroboscope)

[h0001244]

1. All camera same, even DC
2. Yes if the flash is much brighter, otherwise still see it.
3. change the fluorescent lamp to LED
4. Google has more information

[PigPig0708]

多謝各位c hing指教.....