After taking the spectrum of NGC 6543 I decided to try and image it with my 2x barlow lens. My scope does not perform well at this kind of focal length. I also had a lot of trouble colour balancing the object.
From the same night:
Captured in k3ccdtools, stacked in registax v3. Coregistered and balanced in IRIS. Combined and processed as LLLRGB in photoshop.
Exposure Details :
Red 50x1.8s on 200mm @ F5 with SC3.5
2x Barlow 673x3.2s on 200mm @ F5 with SC3.5
Green 50x1.2s on 200mm @ F5 with SC3.5
Blue 50x1.2s on 200mm @ F5 with SC3.5
Curdridge Observatory, Southampton,UK