
Wind the film once. | The perforations of the film must engage with  | 
  | the sprocket teeth. Make sure it is well tense,  | 
  | and close the back  | 
13

Wind the film once. | The perforations of the film must engage with  | 
  | the sprocket teeth. Make sure it is well tense,  | 
  | and close the back  | 
13