PUSH = positive exposure compensation during RAW conversion — brightens an image.
PULL = negative exposure compensation during RAW conversion — darkens an image.
Expose To The Right (ETTR) is an “overexposure” and thus requires a PULL in order to bring a too-bright image back to a normal distribution of brightness.
When an image is too dark, a PUSH is needed to make it brighter— this is often needed, but ideally is avoided, since it increases digital noise.
Push and pull in photographic film days
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