On this occasion the changing optical density of the air coincides with different degrees of distortion.
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The next morning the air was slightly clearer, but the temperature profile was different so the sun was distorted in a different way.
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I intended to get a shot of the sun distorted by refraction just before it set. It looked promising with haze thick enough to reduce the brightness to a safe level.
Some distortion was already visible here but the amount rapidly increases toward the horizon so a lower sun was desirable.
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Unfortunately the haze was so thick that the sun disappeared nearly a degree above the local horizon.
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