Originally designed for the exacting work of hand-tooling photo-engraved printing plates, the Double Lens Magnifier provides 3.5X magnification and offers near-universal application in precision work. It is the magnifier of choice for gunsmiths who are engraving. Features two plano-convex lenses matched to correct distortion.
3 inch focal length (7.3 cm)
Lens Diameter is 1 5/8 inch (4.12 cm)