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What's gone wrong here?

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#1 osbourne one-nil

osbourne one-nil

    Mercury-Atlas

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Posted 05 August 2021 - 06:08 AM

I took 30x20 second exposures of the Summer Triangle region last night, with my 16mm lens, and stacked them in Deep Sky Stacker using mosaic mode. It's resulted in awful distortions around the edge. Is this because 20 seconds is pushing it at 16mm, or simply that stars trail more around edge and there's nothing to be done? 

 

I actually prefer the single shots to the combined!

 

 




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