Albireo

From the author of Sizing Up The Universe

Linear stretch.
LogLogLog stretch.

01:40 EDT July 25, 2006.
Starlight Express SXV-H9 on 10" RCOS at f/9.
Hα = 82 x 0.1 seconds, O-III = 65 x 0.1 seconds

Linear stretch.
Log stretch.

Image through diffraction grating

Albireo-a (the red star).

Albireo-b (the blue star).

22:19 EDT August 4, 2018.
Starlight Express SXV-H9 on 10" RCOS at f/9.
Filter: diffraction grating, 20 x 0.1 seconds.