Carina in NB with the Keyhole!

[DJScotty]

Hi there everyone.
Same data as before.
Some selective, gentle and careful curve manipulation to keep the core under control
Revision full version here
http://www.astrobin.com/149808/B/
Thanks for looking

[alpal]

Hi Scott,
something has happened to the keyhole -
it looks like splotches where the stars should be.
There are also black rings around many stars.
Would you be able to post the original un-stretched stacks & let me have a go at processing?
Perhaps the keyhole was over exposed - exceeding the well depth?
Did you check the levels to see if the were over 65,000?

Otherwise - it's certainly an improvement.

cheers
Allan

[DJScotty]

Al, I know what the issue is. 15 minute subs. Full wells. Will have to reshoot shorter exposures...one day.
Thanks for the feedback

[alpal]

Hi Scott,
sorry to hear that.
I've been caught out like that too.
I now check every sub frame while I'm waiting for the next exposure.
I check focus as FWHM, & whether I've exceeded the well depth.

cheers
Allan

[RickS]

It's almost impossible not to exceed full well on the cores of bright stars with any AP set up. At f/9 my star cores are saturated even in exposures of a few seconds. However, I doubt that you've hit saturation of nebula details in 15 minute narrowband subs. So, I think what we're seeing is more likely to be processing artifacts rather than subs that are too long...

Cheers,
Rick.

[Slawomir]

Hi Scott,

I agree with Rick, and it looks to me that you might have applied star reduction to your image; please correct me if I am wrong.

From my experience, star reduction tends to distort nebulosities, thus I avoid it altogether.

[DJScotty]

Yeah I had a good good look at it today, and yes Slawomir, I did use "Make stars smaller".

There certainly are halos around the stars. Reprocessed and it looks a lot better.

I won't post. I am sure you are as sick of seeing it as I am. Tell me otherwise...

Thanks everyone:thumbsup:

[Slawomir]

Striving for perfection should never cease :)

:thumbsup:

[RickS]

Hit us again, Scotty :thumbsup:

[DJScotty]

Oh alright Slawomir. If you insist! :D
Full version here
http://www.astrobin.com/149808/C/

Thanks for the interest and feedback everyone!:thumbsup:

[DJScotty]

From the top eh Rick! :D