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June 24 2026 APP 2.0.0-beta46 has been released !

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Update on the 2.0.0 release & the full manual

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strange horizonal streaks

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(@ofergol)
Red Giant
Joined: 6 years ago
Posts: 27
Topic starter  

After integration I get strange horizonal streaks that look like clouds in red or green (I hope it can be seen in the attached screen capture).

I took 50X35'' subs of M81 in a bortle 9 location using Fujifilm X-T20.

your help is much appreciated!

Ofer

streaks

 

 



   
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(@wvreeven)
Quasar
Joined: 8 years ago
Posts: 2134
 

@ofergol Streaks like that are called walking noise and get caused by small movements of the camera with respect to the stars during imaging. The movements are too small to cause oval stars on each sub but large enough to cause these streaks when all subs are combined. Dithering over a large enough amount of pixels every 2 to 5 subs when imaging will solve this.



   
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