infile=$1;

if [ $# -eq 1 ]
then
	case "${infile}" in
	  *.NEF)		base=`basename ${infile} .NEF` ;;
	  *.nef)	base=`basename ${infile} .nef` ;;
	  *)		base=`basename ${infile}` ;;
	esac
	outfile=${base}.tiff
else
	outfile=$1.tiff
fi

dcraw -T -6 $infile
mogrify -format jpeg $outfile
mv $infile BAK
rm -f $outfile