Eschenbach Illuminated Magnifier, 5X

5X LED ILLUMINATED HIGH END ESCHENBACH GERMAN OPTICS FOR THE HIGH END COLLECTOR. This is part of the Mobilux line featuring an Aspheric PXM lens with cera-tech hard coating and detachable cover. This model features a 2.36" diameter, 20-diopter lens (the diopter value, which is related to magnifying strength, is the inverse of the focal length). Power is provided by (2) easy to find AA batteries (INCLUDED) which will last up to 5 times as long powering this LED as they do powering up a tungsten bulb.   Keep in mind, the higher the magnification, the shorter the focal length; i.e., the lens has to be closer to the object, and the narrower the field of view as seen through the lens.