The Bright Field magnifier is a dome magnifier with planoconvex lens and optical quality glass. Dome magnifiers provide double the surface brightness and when used with reading glasses the magnification doubles at the same reading distance. The Bright Field magnifier provides 1.8x magnification and offers a durable, scratch resistant lens. It also has a guide line that can be adhered to the lens. By approaching the object, a magnification of 6X can be achieved by means of the accommodation power Magnification: 1.8x Mount: Black plastic edge Lens-to-Image Distance: 5cm.