Perseid meteor shower 2013 - by SteedJoy
Just after midnight on August 12, I captured more than 20 meteors, including a brilliant fireball, in about one and a half hours. They are all Perseid meteors, and each of them seems to be shooting toward one single point below the horizon.
This anti-radiant effect is a consequence of using a wide angle lens, and where it was aimed. At this time, the radiant was above, so visually these meteors would generally be seen as diverging. However, since the radiant is behind the camera, we get the impression of convergence.
All meteor showers appear to diverge from their radiant, and converge on their anti-radiant, on the opposite side of the celestial sphere. Since the radiant is normally above the horizon, the anti-radiant is below it, and we seldom get a visual impression of convergence. This image shows that effect very nicely.
Photo details: Camera Model: Canon EOS 5D Mark II; Focal Length: 24mm; Aperture: f/1.4; Exposure Time: 15 s for each shot; ISO: 4000. 23 photos are stacked to show all meteors in one picture.