For the low contrast category I initially took some pictures of a heron fishing. Sadly perhaps not best choice of subject as birds do have a tendancy to move or fly away. How inconsiderate. The reason I took pictures of the heron was that the loch where it was wading was almost oily with grey feathers of the bird made for quite a flat, if dark scene.
As I didn't get all the pictures I wanted I have chosen a picture and adjusted the exposure manually by using Photoshop to get spread of exposure across several stops. Sitting at computer making picture 1 stop lighter or 1 stop darker and seeing how the histogram responds is actually quite interesting. Histograms not something I have ever paid much attention to before.
Below is the original photograph.
And here are the manual adjustments made in Photoshop.
-2 stops from original
-1 stop from original
+1 stop from original
+2 stops from original
As can be seen every time exposure changes by +1 stop the histogram moves towards the right hand side of graph. similarly changing exposure by -1 stop will move histogram towards left of the graph. It is worth noting that graph does just move, it also expands as it moves. So +2 stops from original has a wider range of light and dark.
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