Fragment of a glory in a pool covered with algae. Unfortunatelly I did not photograph the corona around the sun's reflection. Had the pool and the sunny water-surface been larger, the phenomenon could have been seen better, with probably some Quételet-rings, as well ( 1 - 2 ). More on algal optics with Jari Piikki's and Marko Riikonen's images: ( 3 - 4 ).
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