The Clear Sky Sessions
Astrophoto M39 Clear Skies 23+24.
I shot several photos, more than i remembered, from M39 on two of those evenings in october when i tried to configure the flattener.
Here the high resolution astrophoto on Flickr:
Lessons Learned
What i learned is, that my next refractor will be a flat field refractor!
even if the final astrophoto looks somewhat nice. A closer look to a single exposure shows that i did not yet found the best distance between flattener and sensor. Especially with a look into the corners:
Technical overview of Astrophoto M39 Clear Skies 23+24
| Telescope | VIXEN ED80sf |
| Focal Length | 600mm |
| Aperture ratio | 7.5 |
| Erecting Lense | TSFlat2 |
| Filter | – |
| Mount | Skywatcher HEQ-5 |
| Goto-Control | EKOS |
| Mount Control | INDI |
| Guiding Scope Focal Length | 162 mm |
| Guiding Camera Chip | 4.8mm x 3.6mm, 8bit |
| Guiding Camera Resolution | 1280×960 |
| Guiding Software | EKOS, INDI |
| Dithering | 3 pixel |
| Camera | CANON EOS M100(a) |
| Method | focal projection |
| Camera Control | EKOS, INDI, Gphoto2 |
| Photography Date | 10.10.2021 and 24.10.2021 |
| Exposure-Time Lights | 48x180s |
| Sensitivity | ISO 400 |
| Calibrationframes | Flats, Bias |
| Post Processing Date | 23.12.2021 |
| Stacking, Integration | Affinity Photo |
| Post Processing Software | Affinity Photo |
| Image Editing | Affinity Photo |
| Capture Place | Koblenz, Germany |
| Lightpollution | Bortle 5 |
| Scattered light | strong |
