NGC 6888

Combination of 60, 1 minute images using an H-alpha filter.
SBIG ST-8XE CCD camera. 100mm f/4 Nikon lens.

NGC 6888 is a beautiful emission nebula in Cygnus. From its shape it appears to be an old supernova remnent.

Combination of 20, 3 minute images using an H-alpha filter.
SBIG ST-8XE CCD camera. 5" f/5 refractor at prime focus.

Combination of 20, 3 minute images using an H-alpha filter.
SBIG ST-10XE CCD camera. 5" f/5 refractor at prime focus.

Combination of 10, 3 minute images using red, green and blue filters.
SBIG ST-9XE CCD camera. 5" f/5 refractor at prime focus.

Combination of 60, 1 minute images using red, green and blue filters.
SBIG ST-10XE CCD camera. 5" f/5 refractor at prime focus.

Combination of 30, 1 minute exposures using a clear filter,
10, 1 minute images with red and green filters and 15, 1 minute images with a blue filter.
SBIG ST9XE CCD camera. 10" f/6.3 schmidt-cassegrain at prime focus.

Combination of 60 1-minute images unfiltered and 60 1-minute images using red, green, and blue filters.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham Cassegrain at prime focus.

Combination of 30 2-minute images unfiltered and 15 2-minute images using red, green, and blue filters.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham Cassegrain at prime focus.