This has been used in magic for years and was introduced by Lubbor Fiedler as “Lubor’s Lens.” (I have a few by my desk. I contemplated making a large one as par

This has been used in magic for years and was introduced by Lubbor Fiedler as “Lubor’s Lens.” (I have a few by my desk. I contemplated making a large one as part of a television special I recently shot.)