I got about 4 hours of data last night on the Tarantula Nebula.
That's the first time I've been able to take a picture since March.
I mixed Ha in with Red at 50% & also as 33% Luminance.
Ordinary Luminance was also 33%.
It came out with some wild colours.
The colours were binned 2x2 & the Ha & Luminance were binned 1x1.
Very nice Allan. I think the colours are about right--not wild at all. There is quite a lot of OIII in 2070, hence the green and, of course, Ha, giving the reds.
Geoff
A lovely image, as I noted in CN just a few min. ago. It was worth waiting since March for a wonderful result like this!
As you can see in the image I just posted, color turned out somewhat different upon a pure LRGB combo. We are blessed: not only we have an infinite number of objects out there, but also there's an infinite number of ways to process them and enjoy
Very nice Allan. I think the colours are about right--not wild at all.
There is quite a lot of OIII in 2070, hence the green and, of course, Ha, giving the reds.
Geoff
Thanks Louie,
It came out not too bad considering most of the sub frames gave about 4 arc seconds FWHM.
Some of the color frames were giving closer to 3 arc seconds.
I wish that I'd put the time spent on 1x1 Luminance into RGB as that
hour of 5 minute subs did little for the final picture.
There were 40 x 3 minute subs of RGB binned 2x2:
16 x Red
12 x Green
12 x Blue
The detail was in the 1 hour of Ha - 6 x 10 minute subs binned 1x1.
I should have done 3 x 20 minutes of Ha but I didn't want to risk it with the wind.
Actually - that all adds up to 4 hours not 5 as I said!
Quote:
Originally Posted by strongmanmike
Yay Al!
Good to be back at the helm I bet?
Super field to image that and I'm liking the colours on this one
Mike
Thanks Mike,
Yes it was good to finally take a pic.
I am on my holidays now & at last got a clear Friday night.
I still don't know about those colours.
I bet a re-process would give me different ones again.
As for the field - I could go in any direction there to add a frame to a mosaic - it's rich with targets.
Quote:
Originally Posted by Harel_Boren
Hi Allan,
A lovely image, as I noted in CN just a few min. ago. It was worth waiting since March for a wonderful result like this!
As you can see in the image I just posted, color turned out somewhat different upon a pure LRGB combo. We are blessed: not only we have an infinite number of objects out there, but also there's an infinite number of ways to process them and enjoy
Cheers,
Harel
Thanks Harel,
It was well worth the wait although I would have preferred your dark skies & low FWHM seeing.
It would be interesting to see if you later added some Ha to your pic.
It seems to drastically alter the colours.
Very nice Allan. I like the colours also. Very sharp.
Greg.
Thanks Greg,
I did a bit of a crop of the best part & a slight re-process.
A larger version is on flickr.
Quote:
Originally Posted by Stevec35
Very nice Allan. I like everything about it including the colour.
Cheers
Steve
Thanks Steve.
I think it's a bit of an original.
I pushed the colours really hard in LAB mode.
A noise reduction mask stopped it getting too much colour noise.
In this new re-processed cropped version I didn't reduce the Green.
As Geoff was saying there is Green there because of O3.
I hope you like it?
nice work allan, I have been waiting for you to post a new pic, got to love this Melbourne weather ...
I like the original, you've managed to keep the dynamic range in check. wouldn't mind seeing the 'greener' version for a comparo. there is so much OIII in there, many dslrs struggle to show any red.
It's an interesting interpretation, Allan, but I think the colours are quite pleasing.
Cheers,
Rick.
Thanks Rick,
I like the repro for all those colors of the rainbow.
Maybe pushed a bit hard on the colour but that's what I wanted.
cheers
Allan
Quote:
Originally Posted by rustigsmed
nice work allan, I have been waiting for you to post a new pic, got to love this Melbourne weather ...
I like the original, you've managed to keep the dynamic range in check.
wouldn't mind seeing the 'greener' version for a comparo. there is so much OIII in there, many dslrs struggle to show any red.
cheers
rusty
Thanks Rusty,
I might re-do it again one day.
I'd prefer better data at the occasional 2 arc second seeing that we get in Melbourne
rather than the 3.3 to 4.5 arc second that I got.
It was windy on the night & I had to restart many sub-frames when
wind gusts hit the scope & the guide graph went off the scale.
I probably lost an hour of data from the wind.
As for DSLRs - you're right -
I have some old pics with a DSLR on my flickr photos
& they are no where near as good because the DSLR just can't get the Ha wavelength for reds.
Putting 50% of Ha into the Red channel boosted the red detail & power.
The QHY9 camera is great - I had it at -30 degrees Celsius
& I applied all darks, flats & bias frames that I made fresh the next day.
I also used an Astronomic CLS CCD filter in front of all filters.
Naah prefer the original Al, the punchier colours worked well
Mike
I dunno Mike,
I thought I'd over done the original.
It was done quickly - but there are infinite variations.
The latest one can stand more magnification.
