exif:ISO - field limitations?

Started by Beholder3, April 01, 2014, 03:47:39 PM

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Beholder3

Hi,
I just looked at two files (.cr2 and JPG) from a Canon 5D3 shot at ISO 102.400.
There the exif:ISO shows up as "65535". At the same time the makernotes:baseISO is correctly "102400".
Values below this work nicely.

Is this really written wrong into the files? Or is there as misunderstanding from exiftool?

Alan Clifford

That looks like a 16 bit number has max'ed out to me.

Phil Harvey

This is the way that the EXIF spec stores values larger than a 16-bit integer.  The added some new 32-bit ISO tags to store the value in this case.

- Phil
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux/PowerShell, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).