I shot several photos, more than i remembered, from M39 on two of those evenings in october when i tried to configure the flattener.
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.
High resolution on Flickr:
Session details
| Telescope | VIXEN ED80sf |
|---|---|
| Corrector | TSFlat2 |
| Effective focal length | 600 mm |
| Camera | Canon EOS M100(a) |
| Mount | Skywatcher HEQ5 Pro |
| Guiding equipment | TS-Optics 50 |
| Guiding camera | Omegon 1200b |
| Date of capture | 2021-10-10 2021-10-24 |
| Nights | 2 |
| Exposure (lights) | 48 × 180 s |
| Total integration | 2 h 24 min |
| Calibration frames | FLATS, BIAS |
| Sensitivity | ISO 400 |
| Capture setup | Ubuntu, EKOS/INDI, PHD2 |
| Processing | 2021-12-23 – Affinity Photo |
| Reprocessing | 2023-12-15 – PixInsight, Affinity Photo |
| Location | Koblenz, Rheinland |
| Focal ratio | f/7,5 |
| Image scale | 1,28 ″/px |
| Field of view | 128,0 × 85,3 ′ |
