Carina in Narrow Band

[avandonk]

Details. Canon 5DH, Canon 300mm F2.8L at f/3.5.

HA: Astronomik 13nm HA filter.
Exposures, 10x(2m, 4m, 8m) at 400ISO, fridge at -5.0C.

O3: Astronomik 13nm O3 filter.
Exposures, 10x(2m, 4m, 8m) at 400ISO, fridge at -5.0C.

HA red to RED
O3 green to GREEN
O3 blue to BLUE
All data collected with very near full Moon ie 97%.


2MB image
http://members.optusnet.com.au/~cheekyfish/CAR_NB.jpg


bert

[iceman]

That's a beautiful image, Bert! Lovely result indeed.

[aworley]

Hi Bert,

Very very nice......that is wide....

Alex

[Garyh]

Yes what Alex above says ^^^^^
Verrrrry nicely done Bert!

[avandonk]

Thanks all for the comments. A new trick I have invented is to produce a 'colour' image for each exposure level stack before the HDR process.

So for each exposure 2,4 and 8 min in this case, I used ImagesPlus to combine the HA to the red channel and the O3 blue and green to their respective colours.

All HA and O3 stacks were identically digitally developed in IP and levels adjusted in PS before this combination.

The good bit is when adjusting the parameters in EasyHDR you are essentially looking at the final image with all the components drawing information from each of the three exposures stacks. This is far better than trying to tweak a final tone mapped image. What is happening is that you are adjusting levels and contrast and curves while drawing on the data present in all three exposure stacks. Once the tone mapping is done a lot of this data is lost and can not be retrieved.

I hope this makes sense?!

Below are the three 'colour' images that were used as input into EasyHDR. The fourth image is the output of EasyHDR. It is obvious the levels and saturation are a bit high but this is easily tweaked in PS without any image degradation.

Bert

[Tilt]

Excellent image Bert, nice detail all the way out to the edges.

Michael

[multiweb]

Love Eta :) You've got some great shots there. Top work. :thumbsup:

[jjjnettie]

Beautiful work as usual Bert.

[KenGee]

Well done thanks a cracker.

[spearo]

well done
nice processing
frank

[jase]

Excellent Bert. Almost looks RGB instead of narrowband! Good to see you in a continual state of refinement with the HDR process. Well done.

[gregbradley]

Nice image Bert. I like that a lot.:thumbsup:

Greg.

[avandonk]

Thanks Jase. Below are three images. First is straight color, second is narrow band and the third is colour plus narrow band by adding the RGB channels in IP. This method allows me to go very deep at my light polluted site without all the hassles of gradients etc.

Bert

[avandonk]

Here is an animated GIF of the last three images.

1.2MB
http://members.optusnet.com.au/~cheekyfish/car02.gif


Bert

[Jen]

Nice pictures Bert :thumbsup::thumbsup::thumbsup:

[Tamtarn]

Thanks for posting the animated GIF Bert keep up the good work