Taken by piggybacking a 135mm lens with Astronomik narrowband filters attached to the front of the lens mounted on a Vixen Atlux mount and an Atik 383L mono CCD camera.
I captured 3 minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of noise and vignetting in the final image. The exposure time was 60 minutes using H Alpha filter , 15 minutes using an O111 filter on X2 bin mode, 15 minutes using an S11 filter on X2 bin mode and 10 minutes using a blue filter.
RGB
RGB + Hubble palette
Hubble palette
This image contains data from a 135mm lens and an 80mm refractor.
