[rat156]

Originally Posted by Paul Haese

Great detail, but the colour is not for me Stuart. The Trifid is I think an object that just cannot be narrow band imaged. Maybe in the HST pallete perhaps, but not this one. Certainly spectacular detail though.

Thanks Paul, this is in HST palette...

Originally Posted by jase

Nice one Stuart.
M20 can look great in narrowband if correctly weighted. Ha (green) is weighted too high in the presented image or the weights are correct, but the Ha signal is simply too strong for the other channels. Its pretty easy to judge this given its nearly washed out the OIII around the center and there's very little SII signal.
Extract more detail? Perhaps, but doubt it would be through deconvolution unless you're talking about a multi-layered approach. Looking at the stars, if it was pushed any harder through deconv, the image would take on a harsher appearance - not ideal, but a matter of taste. Probably some basic contrast enhancements is all it would need to provide more depth and sharpness where required. IMO, Great data that just needs a little more work.

Cheers

Thanks Jase (and everyone else that's commented), I really need to work on getting the HST colour balance right. I've had this problem with NB images before. This target is dominated by the Ha signal, it's red in RGB images, so I'd expect it to be green in Hubble palette. But Jase is right, there is very little contribution from the OIII and SII data I have in here. Back to work on that one.

In the meantime I've done a synthetic green version of the same thing using only the Ha and OIII data. More visually pleasing.

Cheers
Stuart