I want to develop a software which may be in any programming language. The program will send signal at the same time (ignoring delays caused by hardware) to 40 cameras to take picture of an scene from different angles.
For future readers,
I have succesfully achieved what I have explained in my question. This is possible using Canon Cameras and a Canon Camera Hack Development Kit aka chdk and its extension chdkptp. You can see link : Multiple Cameras
I have searched the site but could not find any question about this that's why I wanted to share my knowledge for future askers.