Eta Carina Nebula in Narrowband

[rat156]

Hi all,

Full moon and clear skies, typical of Melbourne recently. So had a crack at Eta in narrowband.

Details here http://tinyurl.com/9243w6

Cheers
Stuart

[CoolhandJo]

Stuart, It always amazes me the difference narrowband images produces! This is very nice as it gives a different perspective of the object. wish I could use narrowbands - but I am flat out just getting used to drift aligning at the moment!

[AlexN]

Oh I like it a lot! sharp, good resolution, nice and close... Ticks all the boxes for me!

I definitely like the processing, the variations in colours are soft and delicate.. Must be nice to have clear skies... Moon or no moon.. :)

[strongmanmike]

That's incredible (HULK?) Stuart, very nice job.

Will be doing that narrow band stuff shortly (promise :whistle:) myself soon :prey:

Mike

[ejcruz]

Great shots, narrowband opens a whole new universe with specticular colors.

Cheers
Eddie

[Chippy]

Superb! Has that ghostly appearance, which I really like.

[Kevnool]

Very nice , the nebulosity jumps out and hits ya.
cheers Kev.

[Bassnut]

Nice colour mapping Stuart, different, and tight everything at that FL, well done.

Do you always use the AO8?, (wouldve been ideal with this image, with a nice bright star smack near the middle I guess), how do you find it to use, convienient? how do you handle rotation to find a guide star, manual or motorised?.

And, with NB, are you guiding before the filters?

[rat156]

Thanks Freddo, I got different colours to most of the NB images on the net, who knows why, I just balance the background to be blackish.

Pretty much always use the AO unit, the bright star has to be in the guide chip FOV, so Eta is of no use. I use TheSky with the FOV indicators to find a suitable guide star and then rotate manually.

Guided after the filters, need an OAG and guide head (and a camera with the guide head port) to go in front...

Cheers
Stuart

[AlexN]

Surprising that you can self guide through NB filters with AO Stuart... I use the same method to find guide stars as you, I find The Sky to be invaluable for that purpose.... Not to mention telescope control

[rat156]

These are the Astronomik filters with a 10nm badpass, so they are wider than Fred's filters.

Luckily around the area there are lots of stars to guide with, Carina is hardly bereft of brighter stars.

I was using 0.5 second guide exposures, probably could have gone faster, but I'm not sure of the benefits of going any faster.

Cheers
Stuart

[Bassnut]

The idea is that around 5hz and up is, you can actually chase seeing, not just guide. The AO7 could (rarely) go to 40hz.

[atalas]

Nice work Stuart !

[multiweb]

:eyepop:Awesome shot mate. Real good details in there. Is it what they call the Hubble pallette you used? I'm trying to have a crack at it too but I only have Ha and SII at the moment. The rest is just clouds, clouds and more clouds ... :windy: