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Hi again all

I had a quick go at NGC7380.

So far 8 x 10mins iso 800 , 10 darks and flats.

How could I get rid of the red glow on the left and bottom edges, and what causes it?

Am I taking my flats wrong?



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You could try a quick fix I often use to eliminate the colour noise. Although in this case it is a bit difficult to distinguish noise from the busy star background............ Anyway,use the magic wand tool in PhotoShop to separate the 'sky' from the stars and nebula,desaturate and darken. Some stars will be lost but the main subject will stand out better.

A quick lunchtime edit attached.


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Another way would be to eliminate it by the dust/scratches filter in photoshop. I've used it @ 31 pixels and cloned the nebula out of the blurred version. Then I've made it a layer and used difference.


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