MERIDIAN CLOCK
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Light Lab 39.46° N, 82.63° W, 40 mi from Columbus, United States

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Light Lab · the evening of Mar 4 from 39.46° N, 82.63° W, looking W

Sunset

6:15 pm

Sun 1.2°Light about 3,100 KShadows ×46

Golden 5:50 pmSunset 6:15 pmDark 6:53 pm

Shadows

×5×10NESW

Pointing east, 46 times as long as what casts them.

How high the sun is

GoldenBlueLevel horizon5:20 pm7:13 pm

The color of the light

Daylight ~5000 KSunset ~2600 KBlue hour ~10,000 K

The sun is down but the sky still glows: soft, even, rosy light.

Starting settings, when it matters

5:50 pm–6:15 pm · golden

Daylight white balance (about 5500 K) keeps the warmth. Meter the sky beside the sun, not the sun.

6:15 pm–6:42 pm · afterglow

6:42 pm–6:53 pm · blue

Tripod. f/8, ISO 100, about 2 s to start, 8 s by the end. Daylight white balance keeps the blue.

Terrain: Mapzen terrain tiles (SRTM and others)

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