OJODIGITAL

Acabo de instalar CHDK. Necesito ayuda con respecto al siguiente script:
@title EXP bracketing
@param a Number of ñsteps
@default a 2
@param b Step size (1/3EV)
@default b 3

if a<1 then let a=2
if b<1 then let b=3
sleep 1000
print "Preparing..."
click "erase"
for n=1 to a*b
click "left"
next n

for s=1 to a*2
print "Shoot", s, "of", a*2+1
shoot
for n=1 to b
click "right"
next n
next s

print "Shoot", a*2+1, "of", a*2+1
shoot

print "Finalizing..."
for n=1 to a*b
click "left"
next n
click "erase"

end


Funciona sin incrementar ni decrementar los valores EV.
Saludos,
Fdo.