Fresnel Lens Magnifiers

A tool for those of us for whom the contour lines have begun to blur together.

These small plastic fresnel magnifiers offer a light weight, non-breakable alternative to your reading glasses or a glass lens magnifier. They provide a 2X magnification when held about 2" away from the map. These magnifiers have a hole in the corner for a lanyard and come packaged in a protective sleeve. They are available in two sizes. Made in Taiwan.

A fresnel lens replaces the curved surface of a conventional lens with a series of concentric groves molded into the surface of a thin, lightweight plastic sheet. The grooves act as individual refracting surfaces, like tiny prisms when viewed in cross sections, bending parallel rays in a very close approximation to a common focal length which, designed properly, is more efficient at gathering light then a standard lens.

Pocket Size
The same size as our other "pocket sized" tools (2.75" x 2.75").
Weighs a mere 9/100th of an ounce.

Large Size
This size matches the size of most of our larger "CD sized" tools (4.75" x 4.75"). Weighs a mere 26/100th of an ounce.