Where to document macro magnification?

[stefferber]

Hello,

thx Phil & friends for your excellent work on ExifTool

I do a lot of http://www.dieferbers.de/wordpress/2020/06/13/mirrorless-macro-with-nikon-z7-nikon-pb-6-bellowsmacro
1) Nikkor 105 micro up to 1:1 magnification
2) Nikon bellows and 50mm with  1:1 up to 1:4.4 magnification
3) Laowa ultra macro with 1:2.5 up to 1:5.0 magnification

For 2) and 3) I use ExifTool to add missing data as there is no data transmission to my Nikon Z7 + FTZ hopefully correct e.g.

exiftool -FocalLength="50" -FocalLengthIn35mmFormat="50" -LensType="MF" -Lens="50mm f/1.8 reversed on Nikon PB-6" -LensInfo="50mm f/1.8" -LensMake="NIKON" -LensModel="NIKKOR AF 50mm f/1.8D" -LensID#=118 -LensSerialNumber="2046522" <filename>


exiftool -Lens="Laowa 25mm f/2.8 2.5-5X Ultra Macro" -LensInfo="Laowa 25mm f/2.8 " -LensMake="Venus" -LensModel="Laowa 25mm f/2.8 2.5-5X Ultra Macro" -LensType="MF" -FocalLength="25" -FocalLengthIn35mmFormat="25" -LensSerialNumber="0815" <filename>

And now to my question: Where can I document the macro magnification from 1.0 to 5.0 in the .NEF file?

[stefferber]

Looks nobody had this problem before. I will do

exiftool -Description="magnification 1:5.0" <filename>

therefore use XMP:Description tag with results in

Code Select Expand


$ exiftool -Description="magnification 1:5.0" 2021-05-01_13-50-57__DSC7937.NEF
$ exiftool -a -G1 -s 2021-05-01_13-50-57__DSC7937.NEF | grep magnification
[XMP-dc]        Description                     : magnification 1:5.0

This shows up in Adobe Lightroom in German as "Bildunterschrift" and in English as "Caption" and in Adobe Photoshop  in German as "Beschreibung"

Do you have any better ideas?

[StarGeek]

Using HierarchicalSubject would also be a possibility, IMO.  Something like Magnification|1:5.0, or ever more divisions if needed.  This would allow Lightroom to group matching magnifications and they would appear under Keywords.

[stefferber]

Thx @StarGeek

I tried to find good description in Lightroom or exiftool about HierarchicalSubject but I could not find much. Do you have a hint?

[StarGeek]

You would construct the hierarchical with each level separated by pipe characters, as the example I gave above.  I can't help much with Lightroom as my copy is very old.  But here's how it ends up looking in Imatch.


I set two images with
exiftool -HierarchicalSubject="Magnification|1:4.0" /path/to/files/
and one image with 
exiftool -HierarchicalSubject="Magnification|1:5.0" /path/to/files/

You might have to play with LR to figure out how to get it to work.  Try setting a hierarchical keyword in LR and then examine the file afterwards with exiftool (see FAQ #3).