Rosette Nebula
This prominent winter astrophotography target which lies a bit to the east of Orion's shoulder is invisible to the naked eye -- but H-alpha filtering brings out detail in the massive hydrogen cloud rendering it accessible even from the city.
Tech Stuff: Borg 71FL/Borg 1.08X Flattener/ZWO ASI 1600MC Color cam/IDAS LPS V4 nebula filter/iOptron CubePro mount, unguided. 2.5 hours of 8 second exposures captured in SharpCap livestacks, processed in Pixinsight and finished with ACDSee. From my yard in Westchester SQM-L 18.8 (red zone Bortle 7).
Rosette Nebula
This prominent winter astrophotography target which lies a bit to the east of Orion's shoulder is invisible to the naked eye -- but H-alpha filtering brings out detail in the massive hydrogen cloud rendering it accessible even from the city.
Tech Stuff: Borg 71FL/Borg 1.08X Flattener/ZWO ASI 1600MC Color cam/IDAS LPS V4 nebula filter/iOptron CubePro mount, unguided. 2.5 hours of 8 second exposures captured in SharpCap livestacks, processed in Pixinsight and finished with ACDSee. From my yard in Westchester SQM-L 18.8 (red zone Bortle 7).