Crescent Nebula in H-a Nebula Enlarge Description Astrodon 6nm FWHM 92% H-a filter Test of Takahashi FSQ106-ED ("New Q") Image Date: 05/24/2007Details: Exposure Time: 80 min unbinnedCamera: SBIG STL11000Telescope: Takahashi FSQ-EDMount: Takahashi EM-200