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!
Same data – advanced processing
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
| Telescope | VIXEN ED80sf |
| Focal Length | 600mm |
| Erecting Lense | TSFlat2 |
| Guiding Scope Focal Length | 162 mm |
| Guiding Camera | Omegon 1200b |
| Camera | CANON EOS M100(a) |
| Photography Date | 10/10/2021 10/24/2021 |
| Exposure-Time Lights | 48x180s |
| Calibrationframes | FLATS, BIASES |
| Sensitivity | ISO 400 |
| Processing Date | 12/23/2021 |
| Reprocessing Date | 12/15/2023 |
| Capture Place | Koblenz, Germany |
