Quote:
Originally Posted by Lester
Amazing view Marc, thanks.
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Thanks Lester.
Quote:
Originally Posted by RobF
Top stuff Marc. I'm not sure about the aesthetics of the colours, but heck, knowing how hard NB is to bring together will just tip my hat  |
Thanks Rob.
Yes, not your typical HST look. I guess the wider the field and sandy milkyway textures turn to deep pink or reddish if they're blue or yellow starfields.
Quote:
Originally Posted by DavidTrap
Marc,
Can you please tell us what length exposures you used for the 11:8:5hr combination?
I'm taking a punt that the oxygen & sulphur exposures were longer?
If so, is there a way of "balancing" the exposures like a G2V star, or does it relate to QE of your particular sensor?
Ta
DT
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Hi David, Sii where 30min exposures, Oiii 20min and Ha 10min. I had to go longer with Sii and Oiii. I kept increasing exposure time to get a better SNR. I actually did well in excess of 48h on these after a lot of trial and error, guiding problems, wind, seeing issues some nights. But in the end I picked the best subs. As far as color balance goes I usually do a pixel math to match all background ADU to the brightest channel then extract the colours in photoshop. I try to stretch each channel equaly and process the way I'd do an RGB shot. I also try to get rid of the greens but I always leave a bit in there as I don't like NB shot with just red/blue and brown.