FRESNEL LENS HD plus additional optical secondary magnifying glass
HD version, some people had trouble viewing the other version international. I will only keep one of the videos up. This test incorporates a secondary glass lens just short of the focal point allowing most of the concentrated light from the first lens to be further concentrated by the second glass lens. The results were a 50% reduction in focal point diameter size but also a power drop of 25%.
Length:
04:15
