Obsession Telescopes - Large aperture Dobsonian telescopes

• http://www.ozsky.org/
• http://www.obsessiontelescopes.com/index.php
• http://www.flickr.com/groups/obsession-telescopes/
• http://www.flickr.com/photos/ronnieharris/
• http://extremetracking.com/open?login=bigscope