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Has anyone seen anything like this before in flat frames? This is a single flat with an STF applied and I have these speckles on one side of the sensor. I've tried a number of different exposure lengths as well as twilight flats and using a flat panel.  |
9.89
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ice crystals, possibly.
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6.78
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Looks indeed like condensation on your sensor. If you look closely, you will probably find them on your lights as well. Turn off cooling for a bit, until they're gone. Then turn cooling back on but try to cool down very slowly.
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Willem Jan Drijfhout: Indeed and alternatively, letting the camera stabilize at its cool down temperature for 15-30 minutes before imaging can help with icing. |
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Look like stars to me
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That's it thanks guys. It was dew. problem solved.
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