This is the ideal reading magnifier for those who can ALMOST read a book (or newspaper or map) but just needs a LITTLE help. For instance, not many people can see the detail on a map, while the map is on their lap and they are sitting bolt-upright looking at the road signs. This is the one I use myself, in the car, in daylight.
…AND TRY THIS:
The focal length is unusually long. Sit two feet away from a monitor or TV, hold the magnifier six inches in front of your face, NOW the magnification becomes 2.5X !