Materials for the Lens Assembly

A glass or plastic lens. This lens had a focal length of about 10".

For the lens base I used an 6"long cardboard mailing tube that was the same diameter as the lens.

For the lens sleeve I used a piece of black poster board 5" wide and long enough to go twice around the circumference of the lens.


The only other item you will need is a roll of double-stick cellophane tape, that is, tape that is sticky on both sides.