Camera used was an Olympus OM-4 , with 35mm lens reversed. Camera was set to Auto. note that the lens could not communicate with the camera. since the exposure was taking to long , I helped things with a detached flash that was set to 1/16 strength. I used the flash from a number of angles , and let the OM-4 decide when to close the shutter !!!
I am not sure if there is any other camera (except a few Olumpuses) that can change the exposure time during the actual exposure !
I don't recall the film.