Eta Carina - going back over data

[monoxide]

well i've been clouded out here for a long while now so i went back over my carina data and pushed it a bit harder.

this will probably look a bit over processed but i tried to get the maximum amount of detail out of the nebula rather than make it look really pretty although i dont mind it, i think its a bit of an improvement on the original and i guess thats what its all about.

anyway, here it is:
http://www.users.on.net/~monox/carina.jpg (1.7mb)
no 200k version this time, sorry

17x600s + flats/darks/bias
6" f/5 newt + baader mpcc + uhc-s

[AlexN]

Looks good to me mate!

I wasnt aware you could image through a UHC filter... Tis good to know!

[monoxide]

theres a big up side to imaging through the UHC-S but it creates its own problems too...

it will dramatically improve contrast but it throws the colour balance a lot and you will get small red halo's around some stars and you also lose pretty much all star colour when imaging through it.

you can pretty much think of imaging through a UHC filter with a colour camera as a '1 shot narrowband image' since most only pass Ha/Hb/OIII

[Matty P (Matt)]

Nice work TJ.

I personally think that it looks a tad overprocessed for my liking but seeing that you were trying to get the most out of the image, I think you have done a great job.

The colour looks spot on.

Well done.

[renormalised (Carl)]

Great shot there. The UHC filter brings out the dark nebulae quite well.

[AlexN]

So... in an imaging session, if you were to get 10 frames without it, and 2 with it to add a contrast boost... stacked them all together, how would that go?

This question should probably have its own thread...

[monoxide]

the ideal way to do it (im going with what i know so far) would be to shoot the majority of the frames *with* the filter since this is whats boosting the contrast and enhancing the nebula then shooting some frames without it and using the unfiltered shots to bring back the star colour by using masks, that way your not actually stacking anything together but kinda swapping out the stars and nothing else.

[renormalised (Carl)]

That would be the way to do it....sounds like a future project

[monoxide]

i can start to get serious when the new scope arrives

[renormalised (Carl)]

Will look forward to seeing the results

[jase (Jason)]

A pleasing result Tony. I think the image has been sharpened a little too much, though the details are nice. Look forward to seeing more. Well done.

[skeltz (Rob)]

Nice image, look forward to more images when you get your new scope...cheers