This lightweight Magnifier is designed to be entirely portable. Tungsten bulb illumination lights up your viewing area. The aspheric lens is optimized for minimum distortion and maximum clarity. User instructions included. Powered by 2 AA Batteries (Not Included).
Diopters: (1+F/4): 8.0D
Lens Diameter: approx. 2 in.
Image Vergence: -4.0D
Effective Focal Length: .49 in.
Field of View on Page: 3.14 in.