new icn messageflickr-free-ic3d pan white

Aurora time lapse

Aurora Borealis, looking north and just above the horizon more or less right at the constellation Cassiopeia from a position to the east of Glasgow, MT. You can also see two satellites tracking through the image, one northwards, one southwards, and a military jet zipping along westward near the bottom of the image, that one is easier to see full-screen. Busy night, eh? Each frame here represents about four seconds; the playback is quite a bit faster than that, so this qualifies as bona-fide time lapse. The clip was constructed from 40 still frames from my EOS50D, taken the evening of the onset of the April 3-4-5-6 geomagnetic storm, all from the same point and with the same camera settings (details below.)


***Let this load, then play it at least twice... flickr, aside from crushing the resolution, seems to have a problem with replay speed in some browsers. This should run for a total of about four seconds.


I uploaded this at about 4x this resolution, and was very disappointed to see it reduced down so far.


Oh well. I used Canon's 50mm ƒ/1.4 lens, wide open, after manually focusing it on a star. All these shots were taken at ISO 3200, 4 seconds exposure, from a fixed and locked tripod, adjusted and balanced to the same criteria using Aperture 3, then combined using the Mac's movie software and converted from .dv to .mp4 using Handbrake.


26 faves
Uploaded on April 7, 2010