Abstract: A telescopic zoom lens system has a minimum magnification thereof is more than 2, and includes a positive objective lens group, and a positive eyepiece lens group, in this order from the object. Further, a zooming lens group which is made moveable along the optical axis upon zooming is positioned on the side of the object with respect to the primary image forming plane of the objective optical system.

Abstract: The present invention (10) discloses a removably attached magnifying lens (22) which is designed for placement on display windows (14) of small devices such as are found on cellular telephones (12) and the like. The lens (22) is mounted onto an adjustable housing (20) having tabs (18) thereon for being grasped by the hand of the user (16) whereby the display window (14) can be brought into visual focus. The housing (20) can be attached to the display window (14) or to, for example, the instrument panel (38) of an airplane (40) by adhesive means 24 or a strap system (36). Also, the present invention (10) can be designed to fit variously shaped gauges (48), for example, round (46) or square (44) gauges.