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  #1  
Old 31-08-2008, 01:40 PM
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spearo (Frank)
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M27, NGC 6853 Dumbbell or Dumbel ??

Hello everyone,

I'm almost done setting up all my new gear...

Just had time for a few shots of M27 low on the horizon. Not the best but a big personal improvement (I attach my previous best! what a shocker! )

Will keep working on focus and I need to touch up the collimation on C14 just a wee bit but I'm still happy I got one image out of the weekend despite the setup not being 100%.

Anyone know what the "right" spelling is for this nebula? Is it with one or two "B"s ? My software says 2 Bs, the NASA site seems to also use 2 Bs but then I also found it spelt with only one.

I'm suspecting its an "American spelling versus Australian spelling" kinda thing.

hope you All had good luck on the weekend. I'll be at it again next w/e weather permitting!
cheers
frank
Attached Thumbnails
Click for full-size image (M27-web-IIS.jpg)
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Click for full-size image (old dumbell 2x483 1x60 iso 800 and 3200 bumped less blur cropped levels_filtered labelled sized.jpg)
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  #2  
Old 31-08-2008, 02:01 PM
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peter_4059 (Peter)
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Great images Frank. I had planned to have a go at M27 with the DSI last night but got fooled by the weather forecast. Maybe next month!

Peter
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  #3  
Old 31-08-2008, 05:47 PM
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strongmanmike (Michael)
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That looks pretty good Frank.

nice round stars and plenty of detail in the nebula.

There was an analysis of the correct RGB colours for the dumbell a few years ago and the conclusion was that the blue in the middle should be more of a teal green but your image looks great anyway

I believe there is a jet of material eminating from the central star in the dumbell, it comes almost straight out of the image in one direction and protrudes out the back in the other direction, can you see it? If not have a look at Richard Crisps Ha + OIII version in the sepearate post I've made to this forum.

Mike
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Old 31-08-2008, 06:18 PM
Alchemy (Clive)
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big improvement there frank, bigger scope, slower iso plus experience has given you a boost up in detail. its a low item on the horizon here so is difficult to get good detail.... well done.
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  #5  
Old 31-08-2008, 06:46 PM
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iceman (Mike)
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Lovely work, Frank. I like the colours.
The second (non cropped) one has some uneven-ness to the background - like just the centre was processed?
Did you do flats etc?
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Old 31-08-2008, 07:51 PM
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Thanks guys!
Mike (Iceman) the second shot is from 2006 using a C9.25 on my old CG5, shot at F/6.3 including some ISO 3200 frames (how little I knew...the shame of it...)
I think from memory I may well have masked and processed just the nebula at the time. It was the best I could do in 2006, so I'm happy with the progress but there's still a long way to go!

Clive and Peter thanks , It's very low on the horizon, not sure if I'll get another shot at it this time around...maybe next Friday, weather stopped me in tracks all weekend long!

Mike (The Strong one...though the other one is learning Karate so...) Thanks, I had a look at the image from Richard Crisp which does seem to show a jet aimed 22:00 to 16:00 , you have NO chance of seeing it on a shot I took hahaha
Maybe if
a) my focus was better (just built a Hartmann mask for the C14 for next w/e)
b)collimation was 100% (close but maybe just 96% now)
c) it had been at zenith when I imaged and
d) i'd shot at ISO 400

then I'd stand a chance but as it is
I'm lucky I got the little guy at all!
:]

I can see a faintly more reddish partion in my image which might correspond to a part of the jet but the whole jest doesn't show on my shot.

I'll know to look for it next time
thanks
frank
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  #7  
Old 01-09-2008, 04:52 AM
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Sorry I didn't read it carefully enough, I didn't realise the one on the right was an older version for comparison

Great improvement, nicely done!
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  #8  
Old 01-09-2008, 07:17 AM
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h0ughy (David)
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NIce result with the effort you put in. Wished I was out there to get some photons........
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  #9  
Old 01-09-2008, 07:37 AM
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Nice shot Frank. Great colour.
Phil
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Old 01-09-2008, 09:45 AM
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Nice detail showing Frank! not the easiest target to image being fairly low down. Nice quicky!
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  #11  
Old 01-09-2008, 11:47 AM
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A great image, lovely colour and detail Frank.
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  #12  
Old 01-09-2008, 04:31 PM
jase (Jason)
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Lovely work there Frank. Colours look great and excellent details coming in from the FL of the C14. Thanks for sharing and look forward to seeing more.
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  #13  
Old 01-09-2008, 06:02 PM
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Thanks everyone
much appreciated!
I've been making an effort to keep most of my processing to minimal tweaks (unlike my earlier technique which was quite brutal with the data!)
Hoping to start getting the most out of the FL of the C14 especially when I can image targets nearer the Zenith
cheers
frank
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  #14  
Old 01-09-2008, 06:12 PM
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Spearo , Apart from the very slight elengation of the star images I much prefer your 2006 shot with the C9.25
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  #15  
Old 02-09-2008, 07:22 AM
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Thanks Satchmo,
I must say I liked the colors of the 2006 one,
I'm happy to be able to get more detail now.
Hopefully with more frames and better collimation as well as processing I can improve the new version
cheers
frank
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  #16  
Old 02-09-2008, 07:35 AM
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theodog (Jeff)
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The scale certainly helps.
Newer version shows plenty of detail and colour.
Well done.
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  #17  
Old 02-09-2008, 07:58 AM
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Thanks Jeff
cheers
frank
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  #18  
Old 02-09-2008, 06:03 PM
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Yeah, the spelling of Dumbbell is the major issue here, I say go with two "b"s .....


Great shot Frank ... and I feel another night of scotch and weary eyes comin' on, now that the weather is starting to warm up.
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  #19  
Old 02-09-2008, 06:20 PM
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Bassnut (Fred)
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Top work Frank, excellent for a narrow field DSLR.

And, since you posted 2 pics, that would be "Nebulae"
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  #20  
Old 02-09-2008, 06:49 PM
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Thanks guys,
Calin, i have this Friday off so I'll be at the observatory from Thursday night...might even have some Glenfiddich somewhere...

Fred, Thanks!
Though I cant resist....i think it's nebula not nebulae...if I'd posted two images of a person I would have asked "do you know the name of this person" not "these people " right?

cheers
frank
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