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<blockquote data-quote="J-see" data-source="post: 457142" data-attributes="member: 31330">Your histogram shows the tonal variation of your image as it is being displayed. It doesn't necessarily say much about the actual information it (the shot) contains. If you underexpose in post, your histogram adjusts to that while the RAW still contains the same information.There is no difference between a pixel value and the noise it contains. Noise is a part of the value. We talk about noise but it doesn't exist as something independent of the signal. The signal the sensor receives is never 100% accurate and when it is processed by the cam, there is more &quot;noise&quot; (inaccuracy) added.Underexposing results into more noise since the accuracy of the signal is directly related to the size of signal captured. By lowering the light that reaches the sensor, you lower the signal and thus increase the noise.&nbsp; It is more visible in the darker parts of the shot because the lack of light is what makes pixels dark to begin with. Their captured signal is low and thus noisier.To add; your dynamic range has little to do with the histogram. It's the difference between the darkest and lightest part of your shot. You can affect the captured range in post but the histogram itself isn't an accurate representation of it.</blockquote>

[QUOTE="J-see, post: 457142, member: 31330"] Your histogram shows the tonal variation of your image as it is being displayed. It doesn't necessarily say much about the actual information it (the shot) contains. If you underexpose in post, your histogram adjusts to that while the RAW still contains the same information. There is no difference between a pixel value and the noise it contains. Noise is a part of the value. We talk about noise but it doesn't exist as something independent of the signal. The signal the sensor receives is never 100% accurate and when it is processed by the cam, there is more "noise" (inaccuracy) added. Underexposing results into more noise since the accuracy of the signal is directly related to the size of signal captured. By lowering the light that reaches the sensor, you lower the signal and thus increase the noise. It is more visible in the darker parts of the shot because the[I] lack of light[/I] is what makes pixels dark to begin with. Their captured signal is low and thus noisier. To add; your dynamic range has little to do with the histogram. It's the difference between the darkest and lightest part of your shot. You can affect the captured range in post but the histogram itself isn't an accurate representation of it. [/QUOTE]

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