does anyone know what the aperture is, for the Polaroid OneStep (600 film) cameras?

I have a feeling it must be the same as the daylight exposure, though perhaps with a higher shutter speed? these cameras seem quite simply made.

of course I would experiment, and enjoy the frisson of excitement, but have only one film pack available, which is really reserved for the shooting (will be using the camera's own flash to trigger a bigger ring light....hence the need for the f-stop)

thanks