This is a Dorr Table magnifier, or lupe, designed for placing on a flat surface. Its pre-focussed & so really easy to use. This 5x magnifier offers a twin element design & so you will achieve excellent edge to edge viewing. Because the design features a transparent acrylic frame, the subject can be easily illuminated. This Dorr table magnifier 5x is great for close inspection of photos or negatives, sewing, crafts, reading, close viewing of insects, plants etc., & of course for reading maps in close detail.