NGC6726 Corona Australis

[gregbradley]

I took this one last week. A classic Southern Object.

Planewave CDK17, Proline 16803, PME.

http://www.pbase.com/gregbradley/image/152825921/large regular size Crop view
http://www.pbase.com/gregbradley/image/152825921/original large size Crop view

http://www.pbase.com/gregbradley/image/152824932/large regular size widefield view
http://www.pbase.com/gregbradley/image/152824932/original large size widefield view

Greg

[nebulosity.]

Awesome Greg:thumbsup: :eyepop:

[tilbrook@rbe.ne]

That's a wonderful image Greg!:thumbsup:

Once the large images are up it burst to life. I really like the way you've processed the blue nebulosity, quite translucent.

Cheers,

Justin.

[RickS]

Nice to see that close up in fine detail, Greg! I'm still trying to identify all the H-H objects and other goodies.

[gregbradley]

Thanks for that.



Thanks Justin. I was surprised it had so much depth. I took this at my home observatory. It can be quite dark in the west which is where I took this one.



Cheers Rick. Yes there are some interesting red patches in the dust there. Something glowing and brooding there.

Greg.

[RobF]

Nice Greg, especially near city lights. Must be a wonderful rig to work with. My only thought would be a little more short exposure data on the brighter regions/stars might make those a little less harsh. It is certainly interesting to see so much close detail when people are normally shooting this ultrawide.

[gregbradley]

Thanks Rob. In hindsight I agree it could have benefitted from some short exposures blended in to the "core". Those central stars are quite bright and that's after several steps to tame them.

The CDK17 is a very nice scope. But it really needs careful flats otherwise it can be very very difficult. Vignetting is one of the compromises in the optical formula they have chosen. So I find it vignette quite badly on the 16803 chip and that becomes aggravated by a bit of hot central spot. If there is any light pollution like to my east, it makes image processing very difficult, hard to get colour balance, and generally requires a lot of careful gradient handling processing. This one was way to the west where its darker for me and not much light pollution. I am going to make a little baffle for the mirror where it meets the central tube to reduce this hot spot after talking to Joe Hedrick from Planewave at AAIC.

Greg.

Greg.

[Stevec35]

Nice detail Greg although the reflection nebula looks pretty burnt out.

Cheers

Steve

[gregbradley]

Thanks Steve. The bright stars are somewhat blown out. Perhaps once the moon is gone I can grab a short series to replace the core.

Greg.

[Ross G]

Great looking closeup photo Greg.

Like the colours.


Ross.

[gregbradley]

Thanks Ross. I was surprised at how colourful it was in the colour combine stage of processing.

Greg.

[Stevec35]

Very good Greg. Looks a lot less harsh now. Nice high res well processed shot.

Cheers

Steve

[gregbradley]

Thanks Steve. Large aperture sometimes means shorter exposure times to get a decent exposure. I was imaging this whilst waiting for a galaxy to rise high enough in the east.

Greg.

[stevous67]

It's a very interesting and very busy area. Very nice Greg.

Steve

[gregbradley]

Thanks Steve.

Greg.

[astronobob]

Another nice piece of work Greg and very hard to notice it been taken from the outer burbs, always a challenge in every capture eh.
You Gotta be happy with that result speshly with the dynamics within the firld, Interesting indeed :thumbsup:

[gregbradley]

Thanks Bob. I was happy as the object is starting to get low in the sky now.

Greg.

[jjjnettie]

Wow....the colours

[gregbradley]

Thanks JJJ. The first colour combine was very colourful which surprised me.

Greg.

[smader]

Fantastic- the Herbig-Haro object HH100 (curly-spiral thing) is a treat!

[gregbradley]

Thanks Stacy. I was surprised at those objects. They do stand out quite well.

Greg.