MagicLantern + manual lenses = ❤

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Exif Comments

Unfortunately this is not true anymore for FB, but having the EXIF comment populated with interesting stuff may still be handy, so i'll keep this here... ;)

When uploading a picture to FB, the comments in EXIF data are used to populate the image description. Unfortunately darktable adds "Developed with darktable.." when converting raw for further processing in GIMP, which may become pretty annoying. So i wrote this simple script, which will either throw the comments away or replace it with relevant data related to the hardware used for capturing the picture (lens name, camera name, exposure details).

#!/bin/bash

CLEAN=0

function get(){
        exiv2 -g ${1} -Pt -q ${pic}
}

while getopts "c" opt; do
        case ${opt} in
                c)      CLEAN=1
        esac
done

for pic in *.jpg; do
        echo "=== ${pic} ==="
        if [ ${CLEAN} -eq 0 ]; then
                DESC="$(get Exif.Photo.LensMake) $(get Exif.Photo.LensModel)\n$(get Exif.Canon.ImageType)\nISO$(get Exif.Photo.ISOSpeedRatings), $(get Exif.Photo.FNumber), $(get Exif.Photo.FocalLength), $(get Exif.Photo.ExposureTime)"
        else
                DESC=""
        fi
        echo -e "${DESC}"
        exiv2 -q -M"set Exif.Image.ImageDescription ${DESC}" \
                -M"set Exif.Photo.UserComment ${DESC}" ${pic}
done

Lens list

Lens detail

Script settings

Outfile format

Useful links

MagicLantern + manual lenses = ❤

Other tools