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by clabacchio

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I think the problem lies in your expectation that the Portra film shots are going to strongly show the effects of different color temperatures. While it's true that Portra 160 (or any commonly-available color film these days) is daylight balanced, color prints and scans of color negatives are always color corrected as part of the process. The photo you're ...


They are relative numbers intended to shift color temperature by perceptually uniform steps. There is an underlying unit called the Mired and each step corresponds to an undisclosed number of them. This is in contrast with fixed steps in the Kelvin scale which would not be perceptually uniform.


That's a warmth adjustment that lets you "fine tune" the white balance for aesthetics (as opposed to accuracy). You might find that a value of "+1" (a little warmer, approximately the same as an 81A filter) gives more pleasing (or healthier-looking) skin tones than the flat "0" setting does, or that a +2 or +3 makes autumn foliage look better. You may find ...


No you don't need to calibrate every shot. Set white balance to kelvin and get it where you like it for the scene. (Never use AWB) If the lighting changes, also change the white balance and reshoot the card. If you never have to change white balance but go from outdoor lighting to indoor lighting, reshoot the card when you go to artificial light. That ...

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