Trace recording
In astrophotography, a trace recording or startrail is a photograph of the night sky with a long exposure time when the camera is stationary or not correctly carried .
Due to the rotation of the earth , the celestial bodies seem to move on concentric circular paths. Depending on the focal length of the lens used, there is a maximum exposure time at which the stars are still depicted as points. This maximum value in seconds is calculated using the following rule of thumb:
Longer exposure times lead to images in which the celestial bodies are no longer depicted as points but as lines (see illustration).
Individual evidence
- ↑ Axel Martin, Bernd Koch: Digital Astrophotography , Oculum Verlag 2009, ISBN 978-3-938469-27-9 , p. 141 ff