[Placidus (Mike and Trish)]

Originally Posted by multiweb

Didn't mind the green in the first place. Sublime work.

Thanks, Marc.

Originally Posted by strongmanmike

You know, apart from the rings around the stars and the red flecks still visible...it is otherwise just about the perfect looking wavelength ordered emission line image really

Mike

Thanks, Chief! The funny rings and coloured smarties will have to wait for software improvements.

Originally Posted by gregbradley

That's a great colour scheme. I like that better than the Hubble palette.
What mix is it?
Greg

Hi, Greg,

It really is straight Hubble Palette - H-alpha to green, [OIII] to blue, and [SII] to red.

Compared with the previous version, I've used curves to increase mid-tone contrast in the H-alpha, which maintains the green in the highlights but reduces it over most of the image area, thus decreasing the overall preponderance of green. Similarly I've used extra arcsinh stretch in the [SII] and [OIII], which increases the relative overall amount of red and blue. I stopped when the overall image (before colour management) had roughly equal amounts of R:G:B.

Best,
Mike