Units on D800E Approximate Focus Distance : 1.5 ?? (LightYears, Angstroms)

[BrianP]

I am trying to do a subject brightness calculation based on various input including FocusDistance.

It's gone in SOME files! All I can find is ApproximateFocusDistance with a raw, unitless number like '0.6'.

Looking at my DB, I have been seeing FocusDistance values like 2.00 m,  0.42 m, 9.44 m, 5.01 m

M:\new\6s-2014.1031-nef.halloween\best>exiftool.exe -*focusd* -ver  6s-2014.1031-238229.halloween.rps.jpg
9.77  <<  Latest Ver
Approximate Focus Distance      : 1.5
...
Approximate Focus Distance      : 1
Approximate Focus Distance      : 1.12

I have a feeling the units are Meters.  I am also seeing between 1 and 3 significant digits.  Is the "1" above  1 +- 1/2 = [0.5, 1.5]? 1.00 += .01/2  == [0.995, 1.005] ?

[Phil Harvey]

Yes, metres.

- Phil