The Instrument

Exercise

In this exercise I had to take 4 identical pictures,  just a few seconds apart.  Once taken the task was to look at the histogram for each image and observe that even though the image looks the same to the human eye, there are in fact differences.  These differences show just how sensitive the camera sensor is.

I must admit that I was a little sceptical that there would be any difference in the histograms because the images really do look the same.

Result

Looking at each histogram in turn, they do look pretty much the same however, if you step through the histograms at a reasonable pace, you can see that there are differences as the histogram moves around with slightly different peaks.  I was surprised at this.  I have shown the four histograms below ordered together so that it is possible to step consecutively through them in the ‘gallery viewer’ .    The actual images themselves are also grouped together and when stepping through those, you can see that they are the.

This objective of this exercise was to demonstrate just how sensitive the camera sensor, especially when compared to the human eye which, cannot see any difference in the real images.  The exercise is a success as differences are shown.

The images I took were shot in RAW and I have made no adjustments to them at all, I simply exported them into jpg format.

Images

Source Images

Histograms