11 replies to this topic

[terry59]

I use Sequence Generator Pro and am unable to get a flat frame with a 268C. Darks, bias and lights are all fine. Each frame looks like the below image

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Edited by terry59, 10 February 2025 - 04:52 AM.

[terry59]

The master flat looks the same

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[terry59]

The two rejection maps tell a different story

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[terry59]

map 2

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[terry59]

I see this split screen occasionally when using frame and focus but never in the lights. I've tried sub second frames to 7s frames and get the same result. I've read of this happening occasionally with both the QHY and ZWO versions. Any suggestions?

[terry59]

Debayering a single flat shows what I was expecting

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Edited by terry59, 10 February 2025 - 06:10 AM.

[terry59]

Processed mono, without CFA selected shows a different thing altogether

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Edited by terry59, 10 February 2025 - 06:32 AM.

[terry59]

rejection map 1

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[terry59]

rejection map 2

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[terry59]

Update: I put the 294M on the scope and flats look perfectly fine. Very frustrating

[AstroOlly]

Hmmm, I have this QHY268c camera and never had or seen before an issue like this with flats, I use 4 second flats with mine and matching dark flats

[terry59]

I’ve found a handful of identical cases going back several years, both QHY and ZWO. I’d love to know the cause