Today's Blue Hour Windows (New York reference)
🌌 Morning Blue Hour
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🌃 Evening Blue Hour
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Blue Hour Science & Camera Tips
Blue hour sits between civil and nautical twilight. City lights balance beautifully with the indigo sky. Use a tripod, low ISO, and apertures around f/8–f/11 for sharp architecture.
Blue Hour Frequently Asked Questions
Blue Hour occurs when the Sun is positioned between 4 degrees and 8 degrees below the horizon.
Ozone molecules in the high stratosphere absorb reddish and yellow wavelengths while selectively scattering deep indigo wavelengths (Chappuis Absorption).
Yes, because the sun is below the horizon, shutter speeds range from 2 to 15 seconds. A sturdy tripod is mandatory to prevent blur.