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Exposure and Understanding the Histogram, Second Edition by Andrew S. Gibson

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Image Quality and Exposure

Exposure is one of the key building blocks of your photographic technique. It’s important to get it right—otherwise, you may have technical flaws in your photos that can’t be corrected in postprocessing.

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The Effects of Underexposure

If you underexpose an image, you will need to correct it in postprocessing by increasing the brightness. This increases the noise levels in the photo, and there’s not much you can do about it. It happens regardless of whether you use the Raw or JPEG format, although you will probably get better results from brightening a Raw file than a JPEG. This issue is more pronounced at high ISO settings ...

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