Prepare the Milk Jug

• 1). Ensure your milk jug is entirely cleaned and dry before you begin to cut it apart. Thoroughly rinse the inside and outside of the jug with warm water and mild dish soap. Dry it completely. Special caution should be taken not to use wet plastic near your camera's lens as it could damage the equipment; it may help to wait overnight to let the plastic completely dry.
  
  
• 2). Locate the flattest area of your dry milk jug. Draw a circle approximately 6 to 8 inches across. Using scissors, cut out the circle.
  
  
• 3). Place your lens facedown in the middle of your plastic cutout. Using a permanent marker, trace the edge of your lens onto the plastic.
  
  
• 4). Cut out the traced hole using scissors. Ensure you have removed all loose bits of plastic.
  
  
• 5). Fit the ring around the end of your lens. Secure the ring to the lens using a thin line of masking tape on the side facing the photographer.
  
  
• 6). Test the efficacy of the ring flash by enabling the built-in flash on your camera. Point the camera at a wall at a distance of 3 feet and take a picture. If light is dispersed relatively evenly in the shape of a circle, you have built your ring flash correctly.