Jump to content

Lobster Claw Nebula. Files to download.


Recommended Posts

In the provided link you can access .xisf, and .tif files of the Lobster Claw nebula to download and play with. The files have been calibrated, registered and stacked. Nothing more has been done to them. There is approx. 7.5 hours of data in the Ha and OIII, and 6 hours in SII. The files will be available for two weeks from today. I'm looking forward to seeing your results, enjoy the files. ?

https://1drv.ms/u/s!ArcbfclKs_QAo1cl9j7ATZSOSRIU?e=dyJfYe

  • Like 1
Link to comment
Share on other sites

Posted by: @Carastro

Yes I did, but I much prefer your colour.  Think I will have another go at it.

Mine isn't a straight up SHO. I mixed SII and Ha in the red channel, Ha and OIII in the green channel, blue channel was OIII. I don't know if that is possible to do in photoshop, I don't use it for astro images, except to crop and resize.

Brian

Link to comment
Share on other sites

Thanks for sharing the data Brian. its always a good learning experience to see someone else's data and and have a chance to work with it.

 

I'm not at all experienced with NB (DLSR and L-eNhance is about it for me) so i've not really been able to do the data justice.

 

i decided to try an HOO type first but blending the S&O into green channel. this gave me -

Lob_AUK_DLM_HOO_F.thumb.jpg.edb5fafea55295b1f57f768400541ac1.jpg

 Then I gave SHO a try and got this.

Lob_AUK_SHO_DLM.thumb.jpg.5bd1da19e060cb3bd4194c852e3c5dcd.jpg

They are not brilliant and in particular i've lost much of the fainter nebulosity that yows in both yours and @Carastro 's

but I'm reasonably satisfied with them at this stage - lots still to learn

 

thanks again

 

David

  • Like 2
Link to comment
Share on other sites

Posted by: @Dmack1

They are not brilliant and in particular i've lost much of the fainter nebulosity that yows in both yours and @carastro 's

but I'm reasonably satisfied with them at this stage - lots still to learn

They both look great. Did you use Pixinsight or photoshop? If you use Pixinsight, a good tip to remove the magenta background in the second image, invert the image, then apply SCNR to remove green, then invert back. With magenta being opposite to green on a colour wheel, inverting the image will remove magenta. Just experiment with the strength until you get a neutral background.

  • Like 1
Link to comment
Share on other sites

Posted by: @AstronomyUkraine
Posted by: @Dmack1

They are not brilliant and in particular i've lost much of the fainter nebulosity that yows in both yours and @carastro 's

but I'm reasonably satisfied with them at this stage - lots still to learn

They both look great. Did you use Pixinsight or photoshop? If you use Pixinsight, a good tip to remove the magenta background in the second image, invert the image, then apply SCNR to remove green, then invert back. With magenta being opposite to green on a colour wheel, inverting the image will remove magenta. Just experiment with the strength until you get a neutral background.

What a fantastic tip - i use PI.

 

How does this look?

Lob_AUK_SHO_DLM_noM_pi.thumb.jpg.1f2c7810e4d2ed0e0aee48fe92625443.jpg

 

Link to comment
Share on other sites

Posted by: @Dmack1

How does this look?

A massive improvement. It shouldn't really be used after you have used curves to get the colour you want, better to use it just after stretching. Another way to remove magenta, is the ColorMask script. Choose the magenta mask, in the mask blur, choose 2 or 3 levels. Apply the mask, and reduce the saturation, and/or add a touch of green in curves.

  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...