PIRA Classification: 6A70.90
Description: Four lenses (two of each have the same focal length) are set up in such a way as light rays between the inner lenses are bundled in the center. A roll of tape is placed in this location and cannot be seen while looking through the lenses (all the light travels through the hole of the roll).
Special Instructions: None
Condition: Ok
Setup time: 3 minutes
Safety Issues: None