Same, this behaviour is so weird, please help,
Using device.exposureMode = .locked, or device.exposureMode = .custom, or device.setExposureModeCustom() does not work.
The live preview shows the updated ISO and exposureTime settings, and the printed values right before capturing confirm it.
But as soon as the code tries to .capturePhoto(), the settings are set back to auto, auto ISO, auto exposureTime, no honoring of the manual values set.
Only the exposure bias is honored, but if anything changes in the scene then the exposure will also change (because auto).
felix_do_wizardry
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