This watchmaker loupe is unique due to its very large lens diametre: Ø 40 mm. Very rare size to find making it very comfortable to hold.
The biconvexe lens is scratch-resistant and produces a very sharp and extremely high contrast image. Schweizer uses a UV absorbent optical crown as used with prescription lenses (refractive index n=1.52). The housing is made of light-plastic with an air-circulation hole. All materials used in the fabrication are of the highest quality.