It’s not the shooting temperature that matters, but the spectrum of the illumination. This is more complex and not easily measurable. General advice: if you tend to photograph under daylight, not worth building profile for each flavor of daylight, regardless of the color temp. There will be minor variations between ~D50 and ~D75 lighting (roughly 5000 K and 7500 K CCT) but this tends to get eliminated once WB is considered. If you photograph under unusual artifical lighting often, consider building a profile for that lighting.
Category: How To
Nikon: Focus & Meter Interlocution
Spot metering is locked to the AF point (it will try and put whatever is under the AF point at middle grey without regard for the rest of the scene)
Centre weighted is completely uncoupled from the AF point, will meter from the centre of the viewfinder (you can set how big an area it assesses, or you can have it average out the entire scene)
Matrix is biased towards the AF point but takes the rest into account.
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