Here is a excluded min/max average stack of 16 10 minute exposures of M27 using a 180mm TMB at F9 and ST-10XME with Astronomic H-aplha filter.
Camera control by CCDOPS.
All processing in ImagesPlus.
http://www.mlunsold.com/examples/Temp/M27_160m_Ha.jpg
Mike
Camera control by CCDOPS.
All processing in ImagesPlus.
http://www.mlunsold.com/examples/Temp/M27_160m_Ha.jpg
Mike