Thanks , Yes using the tool I see the lens I tried it on Canon EF 70-200 F4 L had the following infomation
Focal Distance Upper ( m )
Focal Distance Lower ( m )
Hyperfocal distance (m )
depth of field ( m )
depth of field lower limit (m )
depth of field upper limit (m)
Circle of confusion ( mm ) - uses this value to determine hyperfical distance
I checked the values agains a test shot agains subject at a know distance and it seem quite accurate. What I cannot figure out is what Focal Distance Upper and Lower are - here are the test results
Focal length 184mm
F4
circle of confusion 0.02mm
Subject distance to image plane 4.47 m
Focal distance Upper 5.37m
Focal Distance Lower 3.88 m
depth of field 0.10 m
depth of field lower limits 4.58 m
depth of field upper limit 4.67 m
The GUI version of the exiftool does not have all these parameters decoded in the jpg files I tested it on ex canon 6D Mk2
