I don't often do HDR photos as they can look quite artificial, but every now and then I get a bit curious and give it a shot. HDR stands for High Dynamic Range, dynamic range being the breadth of light and dark that an image contains. The human eye is fairly good at being able to simultaneously make out detail in both light and dark areas in any given scene, good but not perfect; sensors in cameras are improving all the time but not as good as us. Yet. A standard photo here would have the strip of girders in the top right as just plain black because, to have the majority of the image properly exposed this area would have to be very dark, but the HDR technique is able to bring out the detail in these otherwise featureless zones. This is normally done by blending two or more separate images together; one that is slightly over exposed and one slightly under exposed. You then take the dark parts from the over exposed image and the light sections from the under exposed image to create one unified picture with more detail (a higher dynamic range). This photo was taken and processed on my phone, which is why it looks a little grainy in places. Still, it's not bad and it's been suggested that, as this is an entirely artificial, man made scene anyway, it works; which is just as well because I had to hang about on the platform for quarter of an hour to have suitably few people clogging up the platform.
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