So an analysis of which focal lengths are used how often is quite easy:


$ exiv2 -g Exif.Photo.FocalLength *CR2 | cut -b 82- | uniq | sort -n | uniq -c


4 24.0 mm


1 27.0 mm


1 28.0 mm


1 34.0 mm


3 35.0 mm


1 45.0 mm


1 48.0 mm


6 50.0 mm


8 70.0 mm


1 85.0 mm


1 97.0 mm


1 127.0 mm


1 135.0 mm


1 173.0 mm


7 200.0 mm
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