Back M8 / NGC6559Lagoon Nebula & NGC6559 in Emission-Line Click to display the full resolution Object InfoTypeDiffuse NebulaConstellationSagittariusDistance5,200 ly Capture DetailsDateJune 16, 2012LocationPalomar Mountain, CAExposureSII 6x15, Ha 8x15, OIII 6x15 (bin 1x1) as RGB EquipmentOpticsTakahashi FS-60C RefractorFocal Length285mm @f/4.7MountAstro-Physics 900GTOCameraSBIG ST-10XMEFocuserRobo-FocusFiltersCFW10A, Astrodon 6nm SII, 3nm Ha, 6nm OIIISoftwareMaxim DL, CCDStack, Photoshop