Thanks for posting! I followed the other posting in raspberry-pi-hq-autoguiding to this forum so I had the 1s fix as well. I noted a few diffs between the files that I didn't specifically see in your diff you posted on page 6. Though now that I see them I should have looked closer at the driver package. I'm going to try with these changes and if that doesn't work I'm going to reinstall the OS and start from scratch. Thanks again for your work.

In mmalcamera.cpp

-- if (!strcmp(cameraModel, "imx477")) {
xPixelSize = yPixelSize = 1.55F;
}
++ if (!strcmp(cameraModel, "imx477")) {
xPixelSize = yPixelSize = 3.1F;
}


In mmaldriver.cpp
-- SetCCDParams(static_cast<int>(camera_control->get_camera()->get_width()),
static_cast<int>(camera_control->get_camera()->get_height()),
++ SetCCDParams(2028,
1520,
16,
-- uint32_t nbuf = PrimaryCCD.getXRes() * PrimaryCCD.getYRes() * PrimaryCCD.getBPP() / 8;
++ uint32_t nbuf = 2028 * 1520 * PrimaryCCD.getBPP() / 8;

-- // | CCD_HAS_STREAMING // Does the CCD support live video streaming?
++ | CCD_HAS_STREAMING // Does the CCD support live video streaming?

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