Aperture value presission

[BogdanH]

Hi Phil,
On Canon raw file I tried:

Code Select Expand

exiftool -MaxAperture=3.5 my.cr2
-and instead of 3.5, value 3.6 was written (there's no problem if I set value to i.e 2.8 ).

Bogdan

[Phil Harvey]

Hi Bogdan,

This value is not stored as a simple floating point number, which means that some values can not be represented accurately.  In these cases, the closest representable value is written instead.

- Phil