Sharpless 2-308

[Logieberra (Logan)]

Stuart, real nice! The upper right of the image - outer shell and bright star region - really draws me in. Pretty!

[gregbradley]

Great image Stuart. Very delicate and interesting.

Greg.

[ozstronomer (Geoff)]

Really nice image Stuart, lots of detail in the bubble

[Shiraz (Ray)]

Gorgeous image Stuart. regards Ray

[Rod771 (Rod)]

Its now image of the day on Astrobin , woo hoo!!

[SimmoW (SIMON)]

Bloody bewdiful!! So 3 dimensional

[tilbrook@rbe.ne (Justin Tilbrook)]

Top work Stuart!

Really looks 3D.

Cheers,

Justin.

[rat156]

Originally Posted by Rod771

Its now image of the day on Astrobin , woo hoo!!

Yeah, quite chuffed about that. I'm liking Astrobin as a place to host my images more and more, I like that you can put up larger images and I really like the plate solve. Their method of deciding the IOTD is quite democratic. No point making your own website now.

Cheers
Stuart

[Rod771 (Rod)]

Originally Posted by rat156

Yeah, quite chuffed about that. I'm liking Astrobin as a place to host my images more and more, I like that you can put up larger images and I really like the plate solve. Their method of deciding the IOTD is quite democratic. No point making your own website now.

Cheers
Stuart

Yes I quite like it too. I saw your image in the banner when uploading some pics today.

Well done mate

[avandonk]

Stuart your image looks quite ethereal. The fine detail is quite apparent. The assignment of NB to colour is quite interesting as looks close to 'natural'.

I see my little F3 astrograph as an early forward scout to look for suitable targets for the BIG guns! It would be a waste of valuable imaging time to use a long slower focal length instrument to see if a dim object can be imaged.

We ALL stand on the shoulders of giants to see further except maybe Mike S.

Bert

[avandonk]

Originally Posted by rat156

Thanks.

The reflections are not axisymmetric because they arise not on the imaging axis. I have found a couple of research papers on removing them, but none really explain why they aren't symmetrical about the star.

Someone here with more optics knowledge than I can explain it I'm sure.

Cheers
Stuart

The 'continuum haloes' are out of focus images of reflections that arise from 'non reflecting' lens surfaces and or filters that are in your image train. This is common in mirror lens assemblies.

Modern detectors are so sensitive that there is no such thing as a 'non reflecting' optical surface where lenses/filters are involved.

The reason for being non concentric is that they are a projection of the reflecting surface and it's view of the entrance aperture of your optic in relation to the bright star's off axis position.

I hope this is clear?

bert

[SkyViking (Rolf)]

Wow that's one fine image of this huge bubble. Great work, the detail and processing is really impressive. And the 3D effect is obvious, nicely done!

[rat156]

Originally Posted by avandonk

Stuart your image looks quite ethereal. The fine detail is quite apparent. The assignment of NB to colour is quite interesting as looks close to 'natural'.

I see my little F3 astrograph as an early forward scout to look for suitable targets for the BIG guns! It would be a waste of valuable imaging time to use a long slower focal length instrument to see if a dim object can be imaged.

We ALL stand on the shoulders of giants to see further except maybe Mike S.

Bert

Thanks for the praise Bert, and thanks for finding stuff for us to shoot. You don't want me standing on your shoulders for too long though, might cause serious injury.

Cheers
Stuart

[Ross G]

What a beautiful photo of an amazing looking object Stuart.

Inspiring work!

Ross.

[Paul Haese]

A stand out image this one. Great sharp detail and nicely processed. Some more data would improve the very minor background noise and give the signal some lift but probably not really all that necessary. Well done.