I see the EXIF standard has a SubsecTimeOriginal field, but the sample photos I've tried looking at don't seem to have populated the field. Or maybe the tooling I'm using (GIMP, exiftool, PHP's
exif_read_data) don't support it for some reason?
Can anyone tell me a camera that definitely populates it on JPG (not RAW) images? A full list would be AMAZING, but I'm assuming no-one will have that!
I know that camera clocks tend not to be set very accurately, with many being out by an hour or even a year, but my use case is still relevant as I'm interested in the relative amount of time between multiple shots from the same camera.