the cooled camera seems to be remarkably sensitive with the Ha ,..... just copied the image details for others to see the exposure times etc,
it makes imaging more fascinating when you can capture the faint details.
well done.
ImageThe Norma Nebula NGC6288 and NGC6164-5Catalog20080411TelescopeWilliam Optics 110mm f/4.7 APO Refractor telescope on
observatory mounted Losmandy G-11 equatorial mount with Gemini 4.GuidingAutoguided with SBIG 402 on Orion ST-80 f/5 guidescope with CCDOps.CameraCentral DS Cooled Canon EOS 400D Digital.
Exposures11 x 8-minute exposures @ ISO 800.Total Exposure time88-minutes.Filter/equipmentAstronomik 2" CLS filter,
WO 0.8x Field reducer/corrector Mk III.ProcessingDarks, bias and flat-fielded with ImagesPlus,
post processing in Photoshop.NotesFocused with DSLR Focus. FOV is 145' x 96' = 2.25° x 1.5°