The outermost region of IC1805

This image of the Heart nebula was taken using my ten inch f/4.8 reflector, a Vixen Atlux mount, PHD auto-guiding and an Atik 383L mono CCD camera.
I captured five minute sub-frames with matching dark-frames and combinded them with flat-field frames to reduce the effect of vignetting in the final image. The total exposure times werw 20 minutes for each R.G.B. colour filter, 40 minutes using  SII, 40 minutes using an OIII filter and 60 minutes
using a H-alpha filter.

Full size RGB

Full size Hubble Palette

Full size RGB + Hubble Palette