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Manual removal of vignetting/border gradient in Photoshop

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Hey guys, I'm new to this post processing malarky and my previous astro photos wasn't affected by vignetting that much. Now I have a coma corrector it is very much a problem when taking photo's of nebulae.

I see some people use an expensive plugin to remove their vignetting/gradient around their borders but if its easily doable manually then I'd like to give it a shot.

Could someone help me out by sending me a guide to remove such objects from my photos please? I have many years using Photoshop, but AP post processing is a completely different beast to tame.



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Hi Tom,

For Photoshop, there is a plugin from Russel Croman called GradientXTerminator.  You can find it here: http://www.rc-astro.com/resources/GradientXTerminator/purchase.php

Version for 32 and 64Bits PS are available.

In my opinion, this is the best plugin to reduce the astronomical images gradient.

A manual nice approach that doesn't imply to buy the plugin, can be found here: http://www.flemingastrophotography.com/gradients.html




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20 hours ago, nandopg said:

A manual nice approach that doesn't imply to buy the plugin, can be found here:

Cheers Fernando for grabbing this for me.

Here is a before and after photo of an unprocessed image of me trying to remove the gradient manually through Photoshop.



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1 hour ago, PESKYWAABBIT said:

Cheers Fernando for grabbing this for me.

Here is a before and after photo of an unprocessed image of me trying to remove the gradient manually through Photoshop.



Wow, you did a great job !! You have reduced the background to a constant value of 40 counts over the whole image.  Great !

Keep up the great job.


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