Another picture from last week. Canon 50D with 10-22mm zoom lens. Almost an hour - the camera battery died at ~50 minutes. Set at ISO 100, and f5.6. No processing. This was just saved as a JPG file by the camera. The glow in the trees at the bottom is the reflection from the lights in my house.
I am not sure why the circles appear to get dimmer near the end of the exposure. The sky looked very clear the whole time. If you have any ideas, please let me know.
Thanks for looking,
Charlie
I am not sure why the circles appear to get dimmer near the end of the exposure. The sky looked very clear the whole time. If you have any ideas, please let me know.
Thanks for looking,
Charlie
Attached Image:
Fort Lewis Observatory: (37.238, -108.052) ~2360m (7744 ft.) elevation.
Darkness - typically 6.5+
Scope - Meade 16" LX200; f6.3 focal reducer
Focus - JMI Smart focus
Camera - SBIG ST-10XE; (~.5"/pixel)
Guiding - AO-8 and/or Meade 5"/DSI/PHD
http://www.fortlewis.edu/observatory
