This script sets and stacks shutter speeds including override shutter speeds if available. It also estimates and displays the shutter speed in seconds (eg: 2.3s) of fraction seconds (eg: 1/4000s). Can be used for single shots, multiple shots with changing shutter speed and multiple shots with static shutter speed. Documentation/Help (save as a small "ShutterSpeedAB.txt" file to your /CHDK/SCRIPTS/ folder) There are 7 parameters that can be set: a = 3 b = -11 c = 2 d = 2 e = -1 2 shots to be taken, step size = -1/3EV (e/a) start EV = -11 2/3 end EV = -12 Tv Start ~1/3243 s Tv End ~1/4096 s