Set aperture and focal length values via ExifTool command processor

[hanswkraus]

Hi, I'd like to set the aperture and focal length values per ExifTool command processor for a fully manual lens. Aperture settings work with:

Code Select Expand

-fnumber=1.8
-aperturevalue=1.8
-targetaperture=1.8
-maxaperture=1.8
-minaperture=32
-focaltype=Fixed
-focallength=135 mm
-Exif:focallength=135 mm
-MaxFocalLength=135 mm
-MinFocalLength=135 mm
-MaxFocalLength2=135 mm
-MinFocalLength2=135 mm
-overwrite_original_in_place
-progress
-P
{File.FullName}But the focal length doesn't work for the [EXIF] and multiple [MakerNotes]. I tried it with and without ' mm' and with
'-all:...' prefix but without avail.
Is somewone able to help me?
Thanks in advance, Hans

[Mario]

Not all tags are writable. Or, sometimes there are tricks.
Did you just google for "ExifTool set focal length"? I found several approaches immediately.