More Than Magnifiers Author:Cary I. Sneider, Alan Gould, Carol Bevilacqua (Illustrator), Richard Hoyt (Photographer) The activities in Magnifiers encourage students to discover the properties of lenses and develop the science skills of observing, comparing, measuring and graphing. The concepts addressed are lenses, images, focal length, magnifiers, cameras, telescopes, projectors and field of view.