The Iris Nebula (NGC 7023)

Probably the hardest target I've ever imaged. My location is way too light polluted, I don't have good enough flats, and some of the nights were with the moon out. All of that makes for some really painful hours processing. I'm not really all that satisfied with the result now either but I've processed this stuff too many times by now.

 

106x240s @ ISO800 lights

110x2s @ ISO800 flats

60x240s @ ISO800 darks

300x1/8000s @ ISO800 bias

 

Skywatcher 200PDS

HEQ5 PRO

Nikon D7000 (Ha mod)

Orion Skyglow 2" LP filter

 

Processing in Pixinsight 1.8

 

Done