I have not done any kind of testing, but have been under the impression for a while that certain color temps seem to generate, or be more susceptible to noise. Incandescent for example.
I know incorrect exposure impacts noise, but has anyone else found that certain lighting seems to impact noise differently?
Maybe it's that WB if it's off far enough has an impact on correct exposure, which in turn impacts noise?
Does anyone have any answers or thoughts? I don't have any examples, just something I have been thinking about as I have read threads on noise over the years at various forums.
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#1. "RE: White Balance and Noise" | In response to Reply # 0bclaff Registered since 25th Oct 2004Sun 01-Jan-12 07:53 PM
White Balance (WB) works by boosting red and blue with respect to green.
Depending on the color temperature the factors can be pretty high.
For example the D70 values for Incandescent are 1.34375 and 2.816406. The D7000 is probably not too different.
The effect is not unlike shooting at your chosen ISO for the green and and higher ISOs for the red and blue.
For the Incandescent numbers above it's like shooting at ISO 100 for green, ISO 134 for red, and ISO 282 for blue.
Remember, noise mostly comes from not gathering enough light.
So, proper exposure is always your friend.
If you perform any kind of post processing then my advice is to Expose To The Right (ETTR).
(By which I mean expose, not overexpose.)
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#2. "RE: White Balance and Noise" | In response to Reply # 1JosephK Nikonian since 17th Apr 2006Mon 02-Jan-12 04:22 AM
Building on what Bill said, it is not unexpected that photos in incandescent light will show noise. Incandescent lights are most commonly found in houses; most houses are poorly lighted. While you can work the camera settings to get a workable exposure for your subject, your backgrounds are normally underexposed, which makes the noise more noticeable.
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