SP-L Medium Size Page 2x Magnifying Fresnel Lens for magnifying large page areas, this size with large field of view allows you to easy enlarge or scan large areas of a page at one time. This fresnel magnifier is very economical and useful magnifying glass for quickly scanning documents, enlarging small text or a computer screen, will easily magnify over half the page of most large books. Ideal medium size emergency magnifier and Survival Lens/fire starter for campers and preppers.