4.5 film (sar)

We used 4.5 film when we took our group class picture today.  To prepare the film you must go in the darkroom in the complete dark (no red light). You then insert the film into the screen like box that has a french name. It must be ridged side up when putting in the screne.  It must go in and fit in the square.  The you put the film in the camera.  You make sure the camera is level using the bubble you put on top. You adjust the focus by turning the small nob on the right back and forth.