Green Flash on the Caribbean
Taken by Alan Dyer on November 15, 2013 @
near Bridgetown, Barbados
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Camera Used: Canon Canon EOS 60D
Exposure Time: 1/640
Aperture: f/6.3
ISO: 200
Date Taken: 2013:11:16 10:08:19
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Details:
The Green Flash, as seen from Barbados, Nov 15, 2013, from near Bridgetown, at a beach overlooking the Caribbean. This was not a particularly pronounced green flash but that last bit of the Sun did turn vivid green visually. This frame is part of a multi-frame high-speed sequence covering the 2 to 3 seconds at the moment of sunset. Taken with the 18-200mm lens and Canon 60Da, so not a lot of focal length for the subject.
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At last, I enjoyed a successful attempt to capture the elusive green flash.
During three weeks at sea attempts almost every evening from the ship to sight the green flash always failed, as the Sun set behind low horizon cloud.
But this night, the Sun set into the ocean with a clear horizon. My location was a small public oceanside walkway on Bay Street near Bridgetown, Barbados.
I shot a rapid fire sequence – the image above is one frame of many catching the last bit of the Sun remaining above the horizon and turning green.
The infamous green flash is a refraction effect caused by the atmosphere separating out the green light and lifting it higher so it’s the last thing you see as the Sun sets. Conditions aren’t always amenable to seeing the green flash – you need a clear horizon and you also need the atmosphere structured with warm layers near the sea creating a mirage effect.
For more details on the technical explanations see Andrew Young’s page at mintaka.sdsu.edu/GF/
… and Les Cowley’s page at www.atoptics.co.uk/atoptics/gf1.htm
Andrew Young has a nice simulation at mintaka.sdsu.edu/GF/explain/simulations/mock/mockSS.html
Photographer's website:
http://www.amazingsky.net
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