NGC3372 (Carina Nebula) - Narrowband

[Ryderscope]

Yep, definitely Carina season. My go at this object with my new rig capturing Ha, OIII and SII for a narrowband presentation. Data acquisition with SGP Pro and image processing in Pixinsight.

I'm pleased with the low noise levels in the data from the ASI6200 camera and I've only had to apply minimal noise reduction. The wider field with the full frame sensor and short focal length allows for the capture of most of this grand object in a single frame. I've also prepared a starless version for those that like the starless presentation (I think that it works well on this one actually :D).

Link to 'starfull' version on Astrobin is here. (https://astrob.in/5gmct2/B/)
Link to 'starless' version on Astrobin is here. (https://astrob.in/5gmct2/0/)
Click on image in Astrobin for a larger resolution.

Full details of acquisition etc. can be found in Astrobin post.

Clear skies,
Rodney

[AdamJL]

Now that is absolutely stunning. Really incredible work there, Rodney!

edit: 20min subs?! Wow.. why did you choose such a long sub time?

[Ryderscope]

Thanks Adam. Why choose 20 minute subs? I guess for several reasons. Coming from CCD to CMOS with the ASI6200 I'm used to taking longer exposures when capturing narrowband data. The ASI6200 has a quite reasonable well depth so even bright objects like NGC3372 won't saturate in narrowband with this sub length. This allows for the capturing of some of the more faint areas of the nebula along with the brighter core. Having said that, I did have to dial down the brightness of the core in post processing to keep the dynamic range under wraps.

[AdamJL]

I will bow to your knowledge. You've got the image and skills to back it all up.
Thanks for sharing.

[Andy01]

Very nice pair of images there Rodney. :)
Lovely use of the NB colour palette, well done! :thumbsup:

[marc4darkskies]

An eye catching (starfull) image Rodney! Nice one! :thumbsup:

[gregbradley]

Sensational Rodney.

Good use of the 6200 with the 20 minute subs. They paid off with a very deep narrowband image.

I see you conquered the star shapes in the corners issue. It all looks perfect.

Greg.

[Ryderscope]

Many thanks lads. The colour palette did work out well even though this can be subjective. The stars came through ok in the final image but the individual subs do show a bit of elongation in one corner. However, by the time we go through calibration, registration, integration and then channel combination they tend to get beaten into shape somewhat :D. I'm a little hesitant to fiddle with it now. Might need another image or three to be sure :)

[Placidus]

Utterly impressive tour-de-force. Well done!

[Ryderscope]

Thanks MnT. A tour-de-force it was indeed. I think that I spent hours staring at the screen in between processing steps. Probably averaged one key stroke and one mouse click every hour :)

[Robert_T]

stunning colour and detail... and really the best focal ratio too for bringing out Carina's expansive and explosive aspect. Excellent.

[strongmanmike]

Yep, lovely wavelength ordered, emission line image of The Great Carina Nebula that Roddles :thumbsup:

The stars across the full res image look good to me mate :confuse3: :shrug:....particularly in the starless version, can't see a single elongated one :P

Mike

[Ryderscope]

Thanks Mike, I'm happy with the way that I've got this rig going now. I can move on now to see what other expanses of the universe can be captured with my new camera :camera::astron:

[pkinchington]

I love the nebulosity you have captured and I like the details you have achieved in the Oiii region.
Cheers Kanga:thumbsup:


PS: What palette did you use?

[Ryderscope]

Thanks Peter. For mixing the colour palette, I used the following pixel math formula in Pixinsight:

Red: SII*.6+Ha*.4
Gre: OIII*.4+Ha*.3+SII*.3
Blu: OIII

I find that this gives me a good starting point and avoids a lot of the green cast from the standard SHO palette. I also adjust the hue some using the curves tool to push the colours towards a final rendition that appeals to my eye whilst maintaining a distinction between the various emission lines.

[rustigsmed]

congrats Rodney, looks like you've got the asi6200 humming along very nicely! exciting stuff.

[Ryderscope]

Thanks Russel, I shall be working on many more :)

[miki63au]

Wonderful colours and Tak sharp (pun intended:D)I have to work more on my 6RC's collimation. Or save $$$ :sadeyes::eyepop: for a Tak APO

[Ryderscope]

Many thanks. Never mind about having to tweak things with your set up. There is always something to adjust/fix/change as we seek to make things as good as they can possibly be.

[miki63au]

Yes, you right :thumbsup: ... I do enjoy tweaking/moding things. That is part of the challenge :)