Celestial hemisphere:  Southern  ·  Constellation: Serpens (Ser)  ·  Contains:  Eagle Nebula  ·  IC 4703  ·  M 16  ·  NGC 6611  ·  Star Queen
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M16, The Eagle Nebula, UHC-S (reprocessed), 22 June 2012, David Dearden
M16, The Eagle Nebula, UHC-S (reprocessed), 22 June 2012
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M16, The Eagle Nebula, UHC-S (reprocessed), 22 June 2012

Equipment

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Description

Had lots of trouble with the mount moving (or perhaps I was just very discriminating) so I threw out more than half the subs for this. Focused with N3 fine focus rather than Bahtinov mask. Reprocessed with my May 2013 workflow to see what the colors look like. I’ve actually learned a bit since last year I think.

In the "b" revision I did two different HDR optimizations, a “Reveal Core” and an “Equalize,” and layer masked them together. I think this does a better job of picking up the peripheral nebula while retaining the detail in the core.

In "c" I corrected the date in the caption. I'm looking forward to shooting this again this year to see if I can do better.

Date: 22 Jun 2012
Subject: M16, Eagle Nebula
Scope: AT8IN + 0.5x Antares telereducer
Filter: Baader UHC-S
Mount: CG-5 (Synta motors)
Guiding: Orion ST80 + 0.5x Antares telereducer + DSI IIc + PHD
Camera: DSI Ic
Acquisition: Nebulosity 3.0.6
Exposure: 22 x 300 s
Stacking: Neb 3, bias included, auto quality screen normalize first, trans+rot align, 1.5 SD stack
Processing: StarTools 1.3 Wipe; Develop 93%; HDR:Reveal core; Sharpen; Deconvolute 3.0 pix; Track; star mask white balance Color Sat.:500%, Low 2.0; Magic:Shrink 2x; Life:Moderate. CS6 Astronomy Tools layer masked blend with older, softer processing to show outer nebula, star color enhance, Astroframe.

Comments

Revisions

  • M16, The Eagle Nebula, UHC-S (reprocessed), 22 June 2012, David Dearden
    Original
  • M16, The Eagle Nebula, UHC-S (reprocessed), 22 June 2012, David Dearden
    B
  • Final
    M16, The Eagle Nebula, UHC-S (reprocessed), 22 June 2012, David Dearden
    C

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M16, The Eagle Nebula, UHC-S (reprocessed), 22 June 2012, David Dearden