M 16 with Hydrogen Alpha data added.

[batema (Mark)]

I have redone this image to include 4 hours and 40 minutes of Hydrogen Alpha data along with 3h and 10m of luminance and 5h and 10m of RGB data.
I blended the Ha and Luminance at 32% Ha and then combined this with the RGB data. Thank you Paul for your help.

I am trying the less is more approach and am happy with the way it turned out.

Full resolution image located here:
https://www.flickr.com/photos/134809.../in/datetaken/

Again any advice appreciated.

Thanks

Mark

[multiweb (Marc)]

That looks excellent Mark. Great details. Did you use drizzle in PI?

[batema (Mark)]

Thanks Marc. I only use photoshop so am unsure what drizzle is. Once I combined the halum with rdb I used the high pass filter a couple of times and cut the stars to original but found a lot of redness in the smaller stars so selected them and did a colour noise reduction which made them less red. I really have no set procedure and just try different things. I haven't been able to find a procedure on line so if anyone could point me in that direction I would appreciate it.
Mark

[Somnium (Aidan)]

nice one Mark

[multiweb (Marc)]

Originally Posted by batema

Thanks Marc. I only use photoshop so am unsure what drizzle is. Once I combined the halum with rdb I used the high pass filter a couple of times and cut the stars to original but found a lot of redness in the smaller stars so selected them and did a colour noise reduction which made them less red. I really have no set procedure and just try different things. I haven't been able to find a procedure on line so if anyone could point me in that direction I would appreciate it.
Mark

I was just wondering because your higher res shows little patterns in the dark areas like a bayer matrix. But might be astrobin uploader introducing compression artefacts.

[batema (Mark)]

If I look closely at the higher res I also see what appears to be lines both vertical and horizontal that would appear to be in the same place as the crop lines when I trimmed the edges a little so I don't know what is going on there either.

[multiweb (Marc)]

Originally Posted by batema

If I look closely at the higher res I also see what appears to be lines both vertical and horizontal that would appear to be in the same place as the crop lines when I trimmed the edges a little so I don't know what is going on there either.

Ha ok, that makes sense now. Nothing to worry about. All stacking programs do it. In regions of minimal overlap you always get that extra granularity. The more subs you get the less evident it is. Most of the time you can get away with it.

[ozstronomer (Geoff)]

Love the image Mark, plenty of detail in the pillers and the stars look perfectly round.

That AP mount must be purring along

Cheers Geoff

[RickS (Rick)]

Nice image, Mark. All that new gear is starting to hum