Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's nebulae  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034  ·  NGC 3077  ·  The star 51Her
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Couple M81 M82, Hugues Obolonsky
Couple M81 M82
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Couple M81 M82

Getting plate-solving status, please wait...
Couple M81 M82, Hugues Obolonsky
Couple M81 M82
Powered byPixInsight

Couple M81 M82

Equipment

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Acquisition details

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Description

Testing a new MPCC flattener with the SW80ED. Shooting at F/D 7.5 with a DSLR is hard.

Not really happy with this flattener, the only good news is that it was not expensive !

Calibration was a chalenge as i'm always fighting with banding coming from the bias frames.

The stacked image is quite noisy for a freezing night @ minus 4°...

Streching the frame was also a hard part as M81 and M82 are very different beast

I drop it here, but i'm not confident that it's a good result.

Version D:

At the end, i leave this background noise. As i feel the balance between objects and background is better this way.

Version E:

Superbias to the rescue, calibration complete !

Version F:

Improving M82 burning in highlight on previous version...

Comments

Revisions

  • Couple M81 M82, Hugues Obolonsky
    Original
  • Couple M81 M82, Hugues Obolonsky
    B
  • Couple M81 M82, Hugues Obolonsky
    C
  • Couple M81 M82, Hugues Obolonsky
    D
  • Couple M81 M82, Hugues Obolonsky
    E
  • Final
    Couple M81 M82, Hugues Obolonsky
    F

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Couple M81 M82, Hugues Obolonsky

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