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Old 18-10-2020, 01:51 AM
Fernando
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M20 - Trifid Nebulae

Dear all,

For your comments ans suggestions, regards, Fernando

Camera: ZWO071MC Pro, at -5C
Scope: SW Esprit 120 ED
Mount: Mach 1
100 x 3 minutes lights + Darks + Flat Darks
Processed in PixInsight
Bortle 4 - 5
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Old 18-10-2020, 08:07 AM
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nice work Fernando. I didn't realise how much nebulosity surround the triffid here... I need to get some more integration time to bring it up :-)

Are you using any kind of filter here?
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Old 18-10-2020, 12:58 PM
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Hi Fernando.

A fair outcome but I think you can do a lot better with that data.

Try extracting luminance, and then using it as a mask.

Then play with curves transform dealing with the the background separately.

Have fun!
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Old 19-10-2020, 12:50 AM
Fernando
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Thanks Robert and Peter. I forgot to list the L-enhancer filter. It highlights the red color, making the photos somewhat reddish and due to this I have had some difficulty in processing the images. As soon as the clouds and rain give a break I am planning to image some nebulae without the filter. As Peter suggested, I am also planning to get the background a little bit darker. I will see how it goes.

Regards, Fernando
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Old 19-10-2020, 07:16 AM
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Quote:
Originally Posted by Fernando View Post
Thanks Robert and Peter. I forgot to list the L-enhancer filter. It highlights the red color, making the photos somewhat reddish and due to this I have had some difficulty in processing the images. As soon as the clouds and rain give a break I am planning to image some nebulae without the filter. As Peter suggested, I am also planning to get the background a little bit darker. I will see how it goes.

Regards, Fernando
makes sense. i suspect that filter (I use it too) is holding back the reflection nebular portion as well.
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Old 19-10-2020, 07:19 AM
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Quote:
Originally Posted by PKay View Post
Hi Fernando.

A fair outcome but I think you can do a lot better with that data.

Try extracting luminance, and then using it as a mask.

Then play with curves transform dealing with the the background separately.

Have fun!
this sounds like something I need to try. Don't suppose Peter you have a link to any tutorial or other info on luminance extraction/masking? I tend to use more blunt instruments like lasso or colour based selections in PS.
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Old 19-10-2020, 01:30 PM
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Great image.
Alex
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Old 20-10-2020, 08:50 AM
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Great image.
Alex

Thanks Alex!
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