Subframe rotated/shifted?

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Rudi
Posts: 173
Joined: 08 Jan 2019, 04:47

Subframe rotated/shifted?

Post by Rudi » 10 Aug 2026, 20:13

Looks like the image is rotated and or shifted?

Image
/Rudi

fabdev
Posts: 588
Joined: 03 Dec 2018, 21:43

Re: Subframe rotated/shifted?

Post by fabdev » 11 Aug 2026, 02:12

It's shifted.
Unfortunetely this happens with some chinese ASCOM drivers, when the subframe is big and has a width or a position not multiple of 2 or 4. Changing slightly the coordinates can (randomly) fix it.

Try to see if a new version of the ASCOM driver is available.

A possible solution is the option "Disable subframes" in the ASCOM plugin, but this makes the download much slower.

Some patches have been added for some cameras, if you like a possible solution for yours, please write me by PM or EMail.
Fabio.

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Rudi
Posts: 173
Joined: 08 Jan 2019, 04:47

Re: Subframe rotated/shifted?

Post by Rudi » 12 Aug 2026, 04:59

Thanks for the swift response Fabio.

I’ll check if there is a new driver. Otherwise I’ll try your suggested hack.

My camera is an ASI1600MM Pro, I forgot to mention that.

PS:
Just got a Staranalyzer, extremely interesting and a steep learning curve.
/Rudi

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