NGC 7139

60 minutes unfiltered, using 3 minute sub-exposures.
SBIG STL- 1001E CCD. 16" f/10 schmidt-cassegrain at prime focus.

NGC 7139 is a moderately bright planetary nebula in Cepheus.

Combination of 10, 3-minute images using red, green and blue filters.
SBIG ST9E CCD. 5" f/5 refactor at prime focus.

Combination of 20, 3 minute images unfiltered.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.