The best quality eye loupe from Bausch & Lomb features a Hastings triplet lens in a lightweight watchmaker’s style frame. The triplet has 3 layers of optical glass cemented together and a large field of view (out to the edges of the lens).
Focal Distance: 1". Lens diameter measures 15.8mm (almost 5/8").
Focal Distance: 1". Lens diameter measures 15.8mm (almost 5/8").