Orion. DSLR Narrow band.

[Nigel G]

First trials with Ha and OIII and my modified Canon 1200D.

Canon banding is becoming a major issue with long exposures.

2h 20m of 600s OIII and 1h 40m of 600s Ha at 800ISO.

There is an endless way of combining the data. I have 4 different attempts here.

1st, Stacking both fits files in DSS to get a combined fits.

2nd, Opening in StarTools LRGB, Ha red, OIII blue.

3rd, opening each file as RGB and then layering in StarTools.

4th, Opening in LRGB, Ha red, OIII blue, then upping the OIII percentage x2.

A long way to go yet, any comments or advice welcome.

Cheers

Nige.

[geordie85]

Try this to help you preserve the core. http://www.astropix.com/html/j_digit/laymask.html

Nice, original images. I've seen many of M42 but never like your last.

[steppenwolf]

That banding is a problem but there is a 'partial' solution. I have run Noel Carboni's Horizontal Banding action on your data and it has made quite a difference - well worth the really low purchase price.

[Nigel G]

32 minutes ago, geordie85 said:

Try this to help you preserve the core. http://www.astropix.com/html/j_digit/laymask.html

Nice, original images. I've seen many of M42 but never like your last.

Thanks for the link, I did take some short exposures for this reason  now I know how to use them.

 

22 minutes ago, steppenwolf said:

That banding is a problem but there is a 'partial' solution. I have run Noel Carboni's Horizontal Banding action on your data and it has made quite a difference - well worth the really low purchase price.

 

That a vast improvement, thanks for the link, going there now  

[Nigel G]

25 minutes ago, steppenwolf said:

That banding is a problem but there is a 'partial' solution. I have run Noel Carboni's Horizontal Banding action on your data and it has made quite a difference - well worth the really low purchase price.

 

Nice and cheap, and it works with CS2 the version I have.

[Nigel G]

@steppenwolf I have downloaded the plug in, its great, feels like the end of a long battle  

Thanks for the advice.

Nige.

[steppenwolf]

My pleasure, Nige. You can run this in several iterations - I used three in the test sample I posted here. Enjoy the other actions that came with it, especially 'Local Contrast Enhancement'.