Carina Nebula

Slawomir (Suavi) · #1 16-12-2014, 05:09 PM

At last, after many many clouded nights we had some clear skies recently, and I managed to put to test Astrodon 3nm Ha filter. I live very close to Brisbane's CBD so I was curious whether this filter will offer any improvement over 12nm one I have been using before.

Integration:
3nm Ha: 28 subs 120 sec each
12nm OIII: 12 subs 120 sec each
12nm SII: 12 subs 120 sec each.

Full resolution image: http://www.astrobin.com/141089/

Few details still require attention, but otherwise I am quite happy with the final result.

Geoff45 (Geoff) · #2 16-12-2014, 05:14 PM

Lovely image Slavomir and such tiny stars! When I took my first glance at the thumbnail I thought you had gone starless. What was your colour mapping? Did the 3nm filter perform better than the 12nm one?
Geoff

Slawomir (Suavi) · #3 16-12-2014, 05:32 PM

Hi Geoff,

Yes, I noticed a significant improvement when using 3nm filter over the 12nm one. In my area you can only see brightest stars, so that's why I went for a 3nm filter. Stars are also much smaller with this filter too.

I blended data and used H-α data as a Luminance channel to create a LRGB image from narrowband data. Would love to be able to use RGB filters, but for that I need to move away from the city...

Thank you for your kind feedback :-)

Slawomir

alpal · #4 17-12-2014, 02:44 AM

Hi Slavomir,
I like that - it's so smooth & full of detail.

cheers

Allan

gregbradley · #5 17-12-2014, 08:53 AM

Fabulous image. Its very sharp. The colour is pleasing although I do prefer the usual palette. The Astrodon site tutorial on how to blend the channels is the best in my opinion.

Greg.

Slawomir (Suavi) · #6 17-12-2014, 09:24 AM

Thank you Allan and Greg.

I will also certainly check Astrodon's tutorial.

RickS (Rick) · #7 17-12-2014, 09:28 PM

Very nice, Slawomir. Perhaps you could wind back the noise reduction slightly? Seems just a little too smooth in places.

Cheers,
Rick.

Slawomir (Suavi) · #8 18-12-2014, 08:56 AM

Quote:

Originally Posted by RickS

Very nice, Slawomir. Perhaps you could wind back the noise reduction slightly? Seems just a little too smooth in places.

Cheers,
Rick.

Agreed. Uploaded a new revision with only very minor noise reduction (Version C).

http://www.astrobin.com/141089/C/

Thank you Rick for your suggestion.

dvj (John) · #9 18-12-2014, 12:06 PM

Excellent image!

Slawomir (Suavi) · #10 18-12-2014, 05:47 PM

Quote:

Originally Posted by dvj

Excellent image!

Thank you John