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Friday, February 10, 2006

Orion, along with the "Big Dipper", is one of the most widely known constellations in the sky. The night my 20mm f/1.8 lens arrived I had to try it out. The most basic types of astrophotos are simply placing the camera on a tripod, focusing at infinity and opening the shutter. Long exposures produce images with "star trails", because the Earth's rotation makes the stars appear to move in the sky. Shorter exposures, like this one, reduce the trailing of the stars. Canon 20D - 30 seconds, 20mm @ f/1.8, ISO 800


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