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Old 04-12-2018, 08:26 PM
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mynameiscd (Andy)
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Join Date: Jan 2017
Location: Langkoop, Victoria
Posts: 458
M42 gradient problem

Here's one from last friday night.
Had a problem with my flats i took on saturday morning.
I didn't have a good look when i took them so after a few days i had a look and theres an obvious gradient problem.
The pink is usual like all the raw images because of the camera mod but there is a definite gradient from top to bottom.
Is there a way to fix up the flats before i stack them or can i do it post processing in photoshop or just leave them out this time and make sure i get the tshirt right and point the scope away from the morning sun sidelight.
I dont have gradient xterminator yet but most of the things i read about it seem good.
I also took a few more that night and with the flats they look like i live near a city or the moon is rising.
A rough pole align with by eye through the spotter scope.
Lucky its dark here and you can spot sigma octanis with naked eye so with the spotter i can set the cross hairs to the pole by eye and im getting 2 mins with only a little trailing.

M42 image
No guiding
40x2min lights
Darks, bias, and flats applied
Stacked in DSS
Processed in Photoshop.
Attached Thumbnails
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Click for full-size image (flat1.jpg)
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