nationalgeographicmagazine:

Fireworks, Manhattan
Photograph by Diane Cook and Len Jenschel, National Geographic
Fourth of July fireworks line up over the High Line in New York City.

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Photo Tip: The long exposures required for firework photography mean slow shutter speeds. Keep your camera motionless by using a sturdy tripod and a shutter release cord. When shooting a scene that includes not just the sky but also other elements like a cityscape, keeping the horizon line straight is particularly important. Make sure your camera is level on the tripod.