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ISS trail

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Re shot below taken 24-03-2023 of the ISS travelling between the moon and Venus

Sony A7iv
Tamron 28 - 200. Set at 200 f/l
30 * shots on continuous mode.
1/8th sec @ f11. ISO 200
Stacked in Photoshop CC

Obviously, the gaps between the streaks is the interval between exposures.
However, why are the streaks jagged?
Does anyone have any ideas?


D Tyrrell.jpg

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If your in AZ mode then the mount is driving in az/alt directions to track the sky and ISS is travelling in a different direction and the 'judder' is magnified

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