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As the Sun sets, one can often see a wedge of darkness rising in the west, pivoting from the North and South. This is the shadow cast by the Earth. Pictured here is the famouse Portland Head Light and the Atlantic ocean.

Canon EOS-1 Ds Mark II digital camera (16MP) and 17mm- 40mm zoom lens at 17mm and f/6.3

RGB Bayer matrix at varying exposures, up to 30s for the dark shot.