Appreciation through Understanding
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I like to photograph the night sky in such a way that the stars appear to be bright points of light and not lines or streaks. This is possible if the exposure time is adjusted so that the images of the stars move on the camera sensor by amounts that are not evident in enlarged images. My calculations of the required exposure times are described in the following pdf document.
charles in General
07:11AM Mar 02, 2013
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astrophotography
star
trails
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