Well, this was an interesting result. While I followed the typical NB
colour mapping of SII, HA, OIII, the outcome was quite unusual and a
challenge to process.
I would appreciate your thoughts and comments on this image, as my searches on the internet do not yield any NB images of this cometary globule.
27 hours exposure (OIII and SII, 8 each, and HA 11 hours)
Legendary work Martin (as mentioned on the SBIG forum). I'm really amazed how well the NB emission line has brought out this target. Certainly when comparing Rob G's recent post anyway. Well done and thanks for sharing.
Beautiful image martin,the detail in the tower is stunning.
Well worth all the time spent i would say ..eh.!!
As for the nb colours ..sorry cannot help you there.
CHEERS
27 hrs exposure for one image... That pretty much equals the following:
1: 3 nights without cloud.. (not likely here)
2: 3 nights without being able to use the scope (i get astro-withdraws)
3: Unimaginably good alignment/tracking...
A rather unique view that Martin, looks really great! I wish I had a permanent setup, marathon imaging like that is rather hard otherwise
Don't think I have seen you on this forum before..? Nice to have your images on show . Watch out for Jase though he will likely put your images through his photonmultiplieramplifierinspectera tor
Watch out for Jase though he will likely put your images through his photonmultiplieramplifierinspectera tor
That equipment is old school Mike. It was replaced by the pixelsquizorama3000 five years ago. This is indeed a fine image. As Martin highlights, the SHO palette on this target did provide an unusual result. I would have expected something different. But hey, with NB you can make up the colours as you go and it is still technically correct.
and many, many thanks for the strong response to this image....I am grateful for the feedback as it was an unusual result, despite a fairly prescriptive approach to the processing routine.
Hi Mike...yes, I joined sometime ago, but have only really browsed the posts.
Jase....only discovered your website and images last night!...and I must say some excellent work is going on there.
that is the best picture I have ever seen of the DT. Beats my old favourite John Gleason's H alpha version by a country mile..and IMHO enormously more detailed than Robert Gendler's APOD
as for astro imaging, i will now take my bat and ball and go home and become a visual observer
Fantastic image Martin. As far as I know the Hubble palette was chosen as the human eye is far more sensitive in the green (x20) than in the red. Subtle and faint contrast then is far more discernible.
HA into RED, O3green to GREEN and O3blue to BLUE from Canon 5DH data.
I took the liberty of doing the same to your data.
HAgreen to RED, SIIred to RED, O3blue to GREEN and O3blue to BLUE.
Below is your original and my colour assignment. You can see how the contrast is not as obvious in the fainter parts of the emission nebula but it looks more 'normal'.
. Watch out for Jase though he will likely put your images through his photonmultiplieramplifierinspectera tor 
I'm not a big fan of NB but that's an awesome image Martin! It's just gorgeous! 
