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Message: <blockquote data-quote="WayneF" data-source="post: 437038" data-attributes="member: 12496">I promise, a quick look shows that in this case, the thin lines absolutely are the ducks.  <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /> The ducks are small, very low pixel count, but there are ducks and pixels.   It shows that any assumed "correction" would in this case be very detrimental to those ducks.  Histograms simply show what the image shows.  But histogram height is merely a relative pixel count.Sometimes extreme contrast is such that a bit of clipping is simply necessary (to avoid a too-dark image).This method allows us to identify WHAT is clipping, and to judge if the detail there is necessary or not.Adobe Camera Raw (like Lightroom) works that way too (holding ALT, or OPTION in Mac).  It works slightly different, but shows same thing when advancing Exposure to show what starts clipping.   Often provides more information about the image than we otherwise realize.For that purpose, I like Levels better.  And Levels provides the center slider, which Adobe Raw now does not.If we want a brighter image in raw, we increase Exposure, but which increases risk of clipping the right end.The Levels center slider also increases brightness (boosting gamma actually),  which increases the brightness of the dark and central areas, WITHOUT shifting the bright end, so therefore, it does not increase clipping.  It is like raising the center in Curves.   Why Adobe removed this in the latest Raw is a mystery to me. You can get it back by selecting the Adobe 2010 Process curves (called Fill Light there).That was not speakng of Adobe.  That is speaking of only the camera histograms, where the single gray camera histogram is useless (Not real data - does not show clipping).The Adobe histograms (like Levels RGB) overlays the the three channels, and is showing real data for all three overlaid channels.   <a href="http://www.scantips.com/lights/histograms.html" target="_blank">Two types of Histograms</a>  shows this difference.   We may not care which channel it is, but we should care about clipping.  Generally, the red channel is pretty bad about clipping in sunshine, which is due to the boost of Daylight white balance.  Incandescent WB is the opposite, it boosts blue.That Adobe way is greatly different (vastly better) than the cameras single histogram. The camera single histogram is NOT showing real data, but instead just a math manipulated simulation about the way the human eye and B&W film responds to color.  It is called Luminosity, but it is a crummy histogram for photographers purposes. So in the camera, only look at the three separate RGB histograms, which do show real data.  But that statement was NOT about Adobe.About all we need to check in the histogram is if we have clipping at the right end.  Then we may need to judge what it is, and how important it is. Some clipping is not always avoidable in extreme contrast cases.</blockquote>

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