Messier 101 - The Pinwheel Galaxy

From the same night as the horsehead nebula.

 

37x300s @ ISO400 lights

20x300s @ ISO400 darks

100x1/8000s @ ISO400 bias

90x8s @ ISO400 flat

 

Skywatcher 200PDS

HEQ5 PRO

Nikon D7000 (Ha mod)

Orion Skyglow 2" LP filter

 

Processing in Pixinsight 1.8

Done