Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5457  ·  NGC 5473  ·  NGC 5474  ·  NGC 5477
M101 without calibration, Jan Monsuur
M101 without calibration
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M101 without calibration

M101 without calibration, Jan Monsuur
M101 without calibration
Powered byPixInsight

M101 without calibration

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Description

This photo is made on May 12 and 13, so not completely dark anymore. Half-moon, two streetlanterns at 10 and 30 meters respectively. Telescope is placed in the shade of a hedge, but in moonlight.

I applied Heavy Dithering, and because of that I decided not to do any calibration at all. So it is an experiment!

I made the stacks in AstroPixelProcessor and did the linear- and non-linear postProcessing in PixInsight (I start to love PixInsight) In the early stages I could see weak traces of dust in the optical train, so - remembering how these traces were on other photo's before applying dithering - this encouraged me. In later stages of the postProcessing I could almost remove the traces. (challenge: find them)

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  • M101 without calibration, Jan Monsuur
    Original
  • Final
    M101 without calibration, Jan Monsuur
    B

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M101 without calibration, Jan Monsuur