Thread: NGC 7293 Helix
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  #10  
Old 26-05-2009, 05:31 PM
jase (Jason)
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Join Date: Sep 2006
Location: Melbourne, Victoria
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Quote:
Originally Posted by Tamtarn View Post
Had to deal with a little vignetting in this image Jase. The night was a bit foggy and smokey as well which could have contributed.

The more I tried to extract the worse the vignetting so it was difficult to get an even blend.

Will try stretching a bit more and see how I go Thanks
Give the "poor man's flat" a shot. Our good friend Gary described the technique in another thread. I've quoted it here;

Quote:
Originally Posted by Garyh View Post
Just cloned out M42 done gaussian of about 10 pixels saved as flat opened up the M42 >apply image >set blending mode to subract, then adjusted brightness and contrast or levels..No vignetting.
wouldn`t work with to many bright subjects but like the Eta carina!
Hope you don`t mind.
cheers
reference - http://www.iceinspace.com.au/forum/s...ad.php?t=26434
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