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  #1  
Old 06-06-2010, 06:54 PM
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Bassnut (Fred)
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Some stray planetary nebs

Hi Guys

4 tiny planetary nebs captured but with very little exposure time, and of marginal quality due to weather conditions.

1 NGC6369 Little Ghost Planetary Nebula
2 NGC3918 Blue Planetary Nebula
3 NGC2392 Eskimo Planetary Nebula
4 NGC3918 Box Planetary Nebula
Attached Thumbnails
Click for full-size image (Mean NGC6369 web.jpg)
173.0 KB66 views
Click for full-size image (Mean NGC3918 web.jpg)
159.3 KB55 views
Click for full-size image (NGC2392 eskimo neb web.jpg)
147.0 KB55 views
Click for full-size image (NGC6445 web.jpg)
134.9 KB55 views

Last edited by Bassnut; 06-06-2010 at 07:23 PM.
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  #2  
Old 06-06-2010, 07:31 PM
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Well, that's quite a colourful array of nebulae there, Fred! What f-ratio did you image these at? I certainly empathise with you about Sydney's weather lately - very frustrating !!
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  #3  
Old 06-06-2010, 07:35 PM
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Thanks, Fred.
Nice little bunch of goodies.

Box Nebula NGC 6445?
Regards, Rob
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  #4  
Old 06-06-2010, 07:36 PM
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Thanks David. The pics are taken at 2250mm FL, but croped to hell. the objects are some 40 arcsecs in dia or less. I upsampled up, to 4* in PS.

The weather a few of weeks ago was great, its turned to shiet just lately.
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  #5  
Old 06-06-2010, 07:38 PM
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renormalised (Carl)
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Not bad for quick and dirty shots, Fred

How long were the exposures??
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  #6  
Old 06-06-2010, 07:50 PM
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Quote:
Originally Posted by Robh View Post
Thanks, Fred.
Nice little bunch of goodies.

Box Nebula NGC 6445?
Regards, Rob
Thanks Ron. Yeah well, depends where you look, "box" or "little gem" .
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  #7  
Old 06-06-2010, 07:54 PM
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Galactic Federation 'Most Wanted' list?
Looks like a bunch of Star Trek "entity" villains Fred!

Nice work Mr V.
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  #8  
Old 06-06-2010, 08:00 PM
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Quote:
Originally Posted by renormalised View Post
Not bad for quick and dirty shots, Fred

How long were the exposures??
They were all 20min subs, but they range from hrs to just one sub each filter, havent logged details on these sorry. They all fall short of optimum, so they sort of get a quick show before being trashed.

Last edited by Bassnut; 06-06-2010 at 09:49 PM.
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  #9  
Old 06-06-2010, 09:18 PM
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Quote:
Originally Posted by Bassnut View Post
Thanks David. The pics are taken at 2250mm FL, but croped to hell. the objects are some 40 arcsecs in dia or less. I upsampled up, to 4* in PS.

The weather a few of weeks ago was great, its turned to shiet just lately.
Great shots Fred - they really contrast nicely against each other. Seems unkind to be trashing - there must be somewhere in the portfolio for them to find a home!?

With regards to the upsampling, I'm curious - do you just whack them up to 400% in one go, or do iterations? (I seem to recall reading somewhere that purists do it 10% at a time to retain max detail?)
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  #10  
Old 06-06-2010, 09:47 PM
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Rob

Yes, from 200% to 400% in one go. The purists increment, but I have found the difference minimal.

Doug

They vary hugely in brightness, and I apply different maping depending on how they look. Thats why I like them, they are all very different.
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  #11  
Old 06-06-2010, 09:51 PM
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A lovely set of miniatures!
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  #12  
Old 06-06-2010, 10:02 PM
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lovely shots Fred. fantastic hubbles....... i did have a play with them in photoshop using topaz detail. i will only post the "result" if you want to see it LOL
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  #13  
Old 06-06-2010, 10:08 PM
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Thanks JJJ, they are truely minatures .

I dont even know what topaz is David , please post .
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  #14  
Old 06-06-2010, 10:16 PM
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tried to extract some more details..............using topaz...........
Attached Thumbnails
Click for full-size image (Mean%20NGC3918%20webtopaxdetail.jpg)
185.5 KB23 views
Click for full-size image (Mean%20NGC6369%20webtopazdetail.jpg)
198.2 KB23 views
Click for full-size image (NGC2392%20eskimo%20neb%20web.jpg)
193.3 KB25 views
Click for full-size image (NGC6445%20webtopazdetail.jpg)
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  #15  
Old 06-06-2010, 10:19 PM
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oooh aaaah
nice work Dave!!
It's like waving a magic wand isn't it.
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  #16  
Old 06-06-2010, 10:24 PM
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Quote:
Originally Posted by jjjnettie View Post
oooh aaaah
nice work Dave!!
It's like waving a magic wand isn't it.
yes - its only the size of the wand that counts..... some take well to the process, others look worse than when you started

having data like Fred produced is great to look at. I love his ability to get these objects this good

Last edited by h0ughy; 06-06-2010 at 10:35 PM.
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  #17  
Old 06-06-2010, 10:33 PM
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Fred! ...a noble challenge...I've always thought small PN's are really the domain of the Hubble, but I suspect intrepid souls like yourself will give them a run for their money
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  #18  
Old 07-06-2010, 01:03 AM
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A great collection of PN's Fred.

Very enjoyable
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  #19  
Old 07-06-2010, 07:20 AM
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Cool stuff. Very exotic colors. Like it a lot.
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  #20  
Old 07-06-2010, 11:17 AM
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David. Thats very interesting, mmmmmm, makes quite a difference, I like it, is Topaz in CS5 or?

Thanks Peter, but the res is just woefull. That Baader FFC is looking mighty attractive !!, been looking for something like that for a while (powermates wouldnt work on my gear).

Thanks Ric, Marc. Ill give them another go when I can get more exposure time........and res.
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