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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 Jan 26 from 39.46° N, 82.63° W, looking WSW

Sunset

5:30 pm

Sun 1.5°Light about 3,200 KShadows ×37

Golden 5:04 pmSunset 5:30 pmDark 6:12 pm

Shadows

×5×10NESW

Pointing east-northeast, 37 times as long as what casts them.

How high the sun is

GoldenBlueLevel horizon4:34 pm6:32 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

5:04 pm–5:30 pm · golden

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

5:30 pm–6:01 pm · afterglow

6:01 pm–6:12 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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