NGC2359, Thor's helmet. I took this image under very clear sky conditions with stars visable down to magnitude 5.5. This patch of nebulosity lies in the constellation of Canis major. I was using my 4 inch f 6/3 refractor, a Vixen Atux Mount, PHD auto guiding, a set of Astronomic narrowband filters with an Atik 383L mono CCD camera. I captured two minute subframes with the camera set on X2 bin mode and matching dark frames and flats to reduce the effect of nose and vignetting in the final image. The total exposure time was 45 minutes in H alpha filter 50 minute in OIII and 40 minutes using a SII filter.
RGB
Bi-colour
Hubble Palette
