QUOTE(Seng_Kiat @ Aug 28 2009, 02:38 PM)
Hi albnok,
I run another test .. Test is under florescent light with F58 on body (no flash gel, etc) ..
Settings: Manual Mode
Aperture: f4.5
Speed: 1/3
ISO: 320
Creative Style: Vivid 0 +1 +3 -2 -1
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1. No flash, AWB

2. Flash Fired, AWB

3. No flash, florescent WB

4. Flash, florescent WB

5. Flash, Flash WB

honestly, i dont understand on how to use color temperature WB. I know, there is common Kelvin WB in the first post of this thready but i have no idea on how it works... what is the color filter? there are a few numbers like 0 M1-M9 .. Thanks ..
Edit:
I tested with Kelvin WB on the first page .. I found that if I shoot with flash on, it will give more natural wb (accurate WB) if compared to no flash.. does it mean, Kelvin WB is for flash on? am i right?
u can set ur WB using 3 methods right?
1) The camera preset WB (AWB, daylight, tungsten, etc)
2) Using specific Kelvin temperature
3) Custom WB using grey card
The easiest will be option 1) but probably not so accurate. The most accurate will be 2) and 3). (3) u may need a grey card).
So why 1) not so accurate? AWB is always guessing ur lighting temp so that explains it. When u use the preset tungsten, it may be it at 2600k ( i dunno) but ur temp is actually 3000k tungsten.
option 2) is accurate if u know ur lighting temp very well. eg: my home tungsten light is 2900k.
regarding, M1-M9 that I am unsure

....
You found that using flash will give more accurate WB is because u know ur flash temp is 5500k and u set it at 5500k.....u can get accurate WB if u know ur lighitng temp well too

I believe the preset "flash" WB will set ur temp to ~5500k right?
So what is a color filter for?
Situation:you are in a tungsten lighting environment and u are using a flash right?
Flash only(u will set WB to FLASH or 5500k):
your subject will be lit with 5500k ligthing from ur flash and the background will be tungsten (say 2800k)...
result: ur background WB may be wrong right? because it is not 5500k

(ur background will be warmer than it shud be)
Flash with flash gel (orange) - you will set WB to tungsten/2800k)
your subject will be lit with ur flash+flash gel (2800k) and the background is tungsten (2800k)
result: ur background WB will be the same as ur subject WB right? so u will have accurate color for both background and subject
Sorry for the long long post...correct me if i`m wrong.

WB is a very interesting and important topic..albnok tot me a lot