Birdlife
Lydbury North Shropshire
Om1mk2 and 150-400 handheld
The effect of diffraction on birds wings is rarely captured. This was part of a portfolio that came about by accident - i have been photographing birds in my garden for 10 years and on a cold and clear January dawn just as the low sun went above the horizion, I was in my kitchen photographing garden birds coming into hidden seeds drilled into a branch above a hedge on the edge of my garden. The sun was directly behind the birds as they flared up and suddenl I was looking at rainbow wings on the back of my camera as it showed the raw file. A scientist friend came over to work out what was happening -The bird's wing acts as a diffraction grating – a surface structure with a repeating pattern of ridges or slits. The structure of the fine hairs, the barbules between the wings, causes the incoming light rays to spread out, bend and split into spectral colours, producing this shimmering rainbow effect. Sunlight has to come in at exactly the right angle or the effect does not work. I under exposed to not lose all that vibrant detail in the highlights and catch this moment the humble blue-tit took off in a totally new light.
Andrew Fusek-Peters
Instagram: @andrewfusekpeters
Twitter: @2peters
Facebook: Andrew Fusek Peters Photography
Website: www.andrewfusekpeters.com
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