Carina Colour and Narrowband Blending in HDR

[avandonk]

Collected some HA and O3 data with the moon up. I already had decent colour data taken with an LPS filter. I simulated a Hbeta by pixel math of the HA red X 0.3. as the Moon would interfere with Hbeta.

Large image 2MB

http://members.optusnet.com.au/avandonk1/CAR_blend.jpg

Details
Canon 5DH. Canon 300mm F2.8L at f/2.8. All at an ISO of 500.

HA, O3 and colour all collected for a range of exposures 15s, 30s, 1M, 2M, 4M, and 8M. Used theses data sets to produce HDR images of each. Then blended them with images plus.
Date: 12/28/2007 21:25
Operation : Auto Color Combine
Color Model : RGB
Red Operation : ADD
Number of Components : 2
File 1 : colrg_R1.fit
File 2 : harg_R1.fit
Green Operation : ADD
Number of Components : 2
File 1 : colrg_G1.fit
File 2 : o3rg_G1.fit
Blue Operation : ADD
Number of Components : 3
File 1 : colrg_B1.fit
File 2 : Hbrg_B1.fit
File 3 : o3rg_B1.fit

I think it has turned out rather well. Will keep trying more combinations but at least I can now realistically get faint nebular data from my light polluted site.
Below are small versions of the images that were blended and the final image.

Will try this method on something dim like the Rosette Neb or IC443.

Bert

[jase]

Not bad at all Bert. The star colours don't appear washed out compared to your previous HDR posts. I think you need to raise the Red channel black point by around 10, then the entire RGB by 3 or 4. The background seems too light to emphasise the contrasting nebulosity. Well done.

[Ric]

A very spectacular image Bert, you've captured it very nicely.

Cheers

[theodog]

Nice image Bert,:) very pleasing to the eye with the many faint wisps of nebula.:)

[Dr Nick]

Well done, you managed to get a lot of detail in those shots! ;)