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Earth Rainbow

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About this observation
Observer
Nik Szymanek
Time of observation
30/05/2020 - 10:53
Object
Earth Rainbow
Observing location
Boxted, Essex.
Equipment
Canon 5D MkII
Canon 28-135 lens
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The image above features what I call an Earth Rainbow, an ‘artificial’ rainbow created during the Spring season when local farmers are irrigating onion fields. Patience is required as the viewing geometry has to be correct. On this afternoon the spraying nozzle was in an accessible part of the field and the Sun at a suitable altitude to create a reasonably high bow in the spray. The nozzle sweeps from side to side and a gravity-operated ‘chopping’ blade breaks up the water flow to help spread the water across the field. This means that the visible rainbow changes on a continuous basis especially as wind gusts also break up the flow. Occasionally, the water droplets become quite large, creating a vibrant, colourful arc.

Photo Details: Canon 5D MkII DSLR and 28-135mm lens at 95mm and f/7.1. Exposure time: 1/1000 sec at ISO 400. Image taken at 17.26 on 05/30/20.

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