M16 - Eagle Nebula aka the Pillars of Creation

Luminance from stack of all Hα images from 2005, 2006, and 2007 using 10" RC.
Total Hα exposure time: 296 minutes.

21:54 EDT Jul 8, 2007.
Starlight Express SXV-H9 on 10" RC at f/9.
Hα = 60 min, O-III = 60 min (in guided 6-minute subexposures).
Richardson-Lucy, Neat Image.

22:53 EDT Jul 17, 2006.
Starlight Express SXV-H9 on 10" RC at f/9.
L = R = Hα = 116 min (in guided 4-minute subexposures). G = B = O-III = 16 min.
Richardson-Lucy.

22:38 EDT Jun 26, 2005.
Starlight Express SXV-H9 on 10" RC at f/9.
L = 100 min of Hα (in guided 10-minute subexposures).
Richardson-Lucy.

01:52 EDT Jun 18, 2005.
Starlight Express SXV-H9 on 4" FSQ106 at f/5.
L = 76 min of Hα + 20 min of O-III, R = 4 min, G = 4 min, B = 4 min (mostly unguided 1-minute subexposures).
Richardson-Lucy, Unsharp Mask.

Hα
Richardson-Lucy.

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