Step #1: Build the baseboard.PrevNext
Cut a piece of black foamcore that fits exactly over your scanner’s glass bed, then cut a 7" square hole out of the center. This will be the baseboard for your camera.
Step #2: Make the boxes.PrevNext
- Make 2 boxes that slide together for focusing. Using cardboard and glue, make a 7"×7" inner box with both ends open, and then an outer box with a lid on top, slightly larger than the inner box, so that they nest snugly together. Line all box edges with duct tape.
- Cut a 3½"-diameter hole in the lid of the outer box.
Step #3: Make the lens board and aperture cards.PrevNext
- Remove the lens from your magnifying glass and cut a hole in the center of a 6"×6" cardboard square to hold it. Tape the edges of the lens securely into place on the cardboard. This is your lens board. Out of heavy cardstock, cut a set of covers for the lens, with different-sized holes in the middle.
- These are the aperture cards, which you’ll tape over the lens to control how much light gets into the camera, just like an iris in a regular camera.
Step #4: Assemble the camera.PrevNext
- Fit one end of the inner box into the baseboard and duct tape it in place from the inside.
- Slip the outer box over the inner box and make sure you can slide it back and forth. Tape the lens board to the outer box with the lens centered over the 3½" hole.
Step #5: Take some photos.PrevNext
- Your scanner camera is ready to go! To focus it, tape
- a piece of tracing paper over the hole at the back of the baseboard, then point the lens toward a brightly lit scene. Slide the outer box back and forth until the image comes into focus on the tracing paper. With my 2½" magnifying glass lens, I needed a focal distance (distance between lens and image) of about 7" to 12" for objects in the same room.
- Tape the camera to the front of your scanner and start up your imaging application. Use the Preview button for fine-tuning the focus, and when you’re ready, click Scan to take a picture. To adjust the image brightness, try different lens aperture cards.