exiftool '−DateTimeOriginal>FileModifyDate' ./*
exiftool −alldates-=2 ./*
# 29 => 'Canon EF 50mm f/1.8 II'
# 48 => 'Canon EF-S 18-55mm f/3.5-5.6 IS'
exiftool -n -canon:lenstype=29 ./*
exiftool -overwrite_original -geotag log.gpx *.dng
mkdir -p Preview && ufraw-batch ./RAW/*.dng --out-type=jpeg --out-path=./Preview