gphoto2 script, http://islandinthenet.com/2012/08/23/hdr-photography-with-raspberry-pi-and-gphoto2/

gistfile1.sh

#!/bin/bash

g=gphoto2

function cap(){
  $g --capture-image-and-download
}

function config()
{
	$g --set-config=$1
}

config /main/imgsettings/imageformat="sRAW"
for shutterspeed  in 2 1.6 1.3 1 0.8 0.6 0.5 0.4 0.3 1/4 1/5 1/6 1/8 1/10 1/13  1/15 1/20 1/25 1/30 1/40  1/50 1/60 1/80 1/100 1/125  1/160 1/200 1/250 1/320 1/400  1/500 1/640 1/800 1/1000 1/1250 1/1600 1/2000 1/2500 1/3200 1/4000 1/5000 1/64001/8000;
do
	config /main/capturesettings/shutterspeed=$shutterspeed
	for aperture in 1.4 1.6 1.8 2 2.2 2.5 2.8 3.2 4 3.5 4.5 5  5.6 6.3 7.1 8 9 10 11 13 14  16 18 20 22;
	do
		config /main/capturesettings/aperture=$aperture
		for iso in 100 125 160 200 250 320 400 500  640 800 1000 1250 1600 2000 2500 3200  4000 5000 6400;
		do
			config /main/imgsettings/iso=$iso
			cap
			mv capt0000.cr2 mond_$shutterspeed"_"$aperture"_"$iso.cr2
		done
	done
done