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Understanding 'Push' and 'Pull' 📹
PUSH = brightens an image, positive exposure compensation during RAW conversion.
PULL = darkens an image, negative exposure compensation during RAW conversion.
See also: ISO invariance
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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Diglloyd Making Sharp Images articulates years of best practices and how-to, painstakingly learned over a decade of camera and lens evaluation.
Save yourself those years of trial and error by jump-starting your photographic technical execution when making the image. The best lens or camera is handicapped if the photographer fails to master perfect shot discipline. High-resolution digital cameras are unforgiving of errors, at least if one wants the best possible results.
- Eases into photographic challenges with an introductory section.
- Covers aspects of digital sensor technology that relate to getting the best image quality.
- Technique section discusses every aspect of making a sharp image handheld or on a tripod.
- Depth of field and how to bypass depth of field limitations via focus stacking.
- Optical aberrations: what they are, what they look like, and what to do about them.
- MTF, field curvature, focus shift: insight into the limitations of lab tests and why imaging performance is far more complex than it appears.
- Optical aberrations: what they are, what they look like, and what to do about them.
- How to test a lens for a “bad sample”.
Intrigued? See Focusing Zeiss DSLR Lenses For Peak Performance, PART ONE: The Challenges, or (one topic of many) field curvature.
