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Is it time to move on from my T4i

Started Dec 30, 2018 | Discussions thread
R2D2 Forum Pro • Posts: 26,551
Re: Is it time to move on from my T4i

Watty dp wrote:

If the far right side of the histogram spikes up that means that the photo will have blow out areas

+1 The histogram can be a very useful tool.  I understand what you’re saying in your post, but I just wanted to add one clarification for those who may be a bit new to reading histograms...

The vertical axis of the histogram (ie. how much it spikes up) is a representation of the percentage of the image (number of pixels) at that particular brightness value.  It in no way represents exposure (that’s what the horizontal axis does).  A spike can in fact extend well beyond the top of the graph, and not indicate any blow out.

With a little practice, this combination of the vertical and horizontal values can thus help you ‘see’ where various areas of your image will end up exposure-wise.

so you would want to reduce your exposure just to the point where the histogram curve ends just at the right edge.

Exactly.  Anything extending beyond the right edge will be blown out.  In fact if you were to turn on the over-exposure warning (blinkies), this area beyond the right edge is what’s being indicated.  Note: if you shoot RAW there can be some headroom, as the blinkies reflect the Picture Style settings you have set in-camera.  In fact for those of us who ETTR (Expose To The Right) the blinkies can often be all that is needed.  

Happy shooting!

R2

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