Photograph copyright: DAVID McMAHON
If you're wondering what this is, there's a simple explanation. It's simply one of the arches above a metal fence line. Each arch is about twenty centimetres or roughly eight inches high and they are set about five centimetres or approximately a couple of inches apart. So the first frame (above) is shot straight into the mid-morning light, through the arch. There's no filter used and the images has not been modified, and the over-riding blue hue completely masks the fact that the arch is painted dark green.
The second frame (below) is taken in exactly the same position, but with the focus reversed. So instead of the arch in focus, I've focused instead on the line of trees about sixty metres away and achieved an interesting effect, especially with the light reflected off the arch.