This hinge arm 31 a is jointed to the hinge yoke 35 of the arm unit 20 using a knobbed hinge pin 36 to form a hinge joint which allows a user to adjust the angle of the lens unit 30 relative to the arm unit 20 as desired within an angular range. [0054] The adjustable table magnifier of this invention will be used as follows: That is, when it is desired to magnify an object, such as a document, usi