Fe50 thanks for the help
I have now tried to use the ult_intrvl.bas script. And it is working. The problem is the exposure is not changing. I am doing something wrong. Please find my settings below
Camera: SX110IS
Bracketing: Bracketing in continous mode-->AV bracketing value = 1Ev
Add raw suffix is not selected.
Now i have set the script and I run the shots. It takes three shots but I see no difference in them. Where am I going wrong?