Interesting article

Joined
Jan 26, 2005
Messages
978
Location
Viera Fl
Thanks Iliah,

I read that. Most goes over head. But I keep reading. Maybe sometime it will make sence. :>))

I keep trying RML , but that is a bit over my head to.

Thank you
 
Joined
Jan 29, 2005
Messages
2,761
Location
nowhere
Dear Gale,

"The Kelvin scale in color theory is based on the blackbody curve locus, which indicates what color a perfect blackbody radiator would reflect, if heated up at different temperatures measured in Kelvin. As a single parameter this is too limiting, or even outright misleading for all possible light situations, so the actual color temperature should also be annotated with a second parameter indicating how far away. and in which direction from the blackbody locus the actual value is."

This simply means that color temperature in Kelvins is not sufficient to set WB - it can be set only for very simple lighting situations.
 
Joined
Jan 29, 2005
Messages
2,761
Location
nowhere
Man-Fai Wong said:
I've been wondering about "Julia" myself. :D Maybe I'm misunderstanding, but is there really a Julia Borg?
My older daughter, 23, big pain :) And I'm her father.

Man-Fai Wong said:
preference for using Nikon's built-in WB presets instead of in-camera custom WB. That post combined w/ the above article would suggest to me that Nikon's in-camera WB presets probably attempt to provide some reasonable offsets to correct for variance from the black body Kelvin temperature (or maybe use the help of preset setting as a starting point for figuring out what the variance is). IOW, Nikon might be more capable to account for variances if you tell it what the primary light source is.
Little bit more complicated, especially in case of light sources with line spectrum. Nikon is using simplified spectral correction, and you can not imitate that even with click on gray. First you need to choose correct light source at least to allow algorithm to work.

That is why I think WB coefficients are rather misleading, and compromizing camera capabilities if everything is based on those 2 numbers.
 
Joined
Apr 24, 2005
Messages
6,099
Location
Denver, CO
Iliah said:
That is why I think WB coefficients are rather misleading, and compromizing camera capabilities if everything is based on those 2 numbers.
If I may ask, what would be the proper way to get correct WB for everyday shooting?
 
Joined
Jan 29, 2005
Messages
2,761
Location
nowhere
It really depends on the converter used. For NC and RML it is choosing the type of light and compenstion; then setting WB from neutral subject. We will add some options for white balance to support independent setting of white balance sliders and type of light. We are also working on support of light spectrum readings EyeOne Photo provides.
 
Joined
Apr 24, 2005
Messages
6,099
Location
Denver, CO
In novice terms that I can understand...

Select a preset WB that is close.
Then select neutral gray.

Now for the tricky question. :)

How neutral does the gray need to be?
 
K

Ken-L

Guest
Although I would agree that the Expodisk is absurdly expensive (at about $100 USD) it does make setting white balance very easy and accurate.

There are lot's of ways to set white balance. I've tried many. Finally, I bought the Expodisk because it's accurate, small, sturdy, handy (it hangs from my neck on it's included strap - see my Avatar) and convenient.

Hey! All that for only $100!
 

Latest posts

Links on this page may be to our affiliates. Sales through affiliate links may benefit this site.
Nikon Cafe is a fan site and not associated with Nikon Corporation.
Forum post reactions by Twemoji: https://github.com/twitter/twemoji
Copyright © 2005-2019 Amin Forums, LLC
Top Bottom