I created this by putting light sensitive paper into an a little box. i made sure the box was all black so light would not come through. There was also a pinhole in the front so a little amount of light would be able to enter to create an image. The small hole created aperture. The focal length is 21.28. I placed my camera outside my window on my balcony. The light source was the sun. After opening the box I could see the bars from the balcony. I scanned the image onto the computer then edited levels. I also inverted colors and flipped the image horizontally.