Concave lenses are used mainly for people who are farsighted, for binoculars and for telescopes. A lens that is convave makes everything look smaller. You can fit more into the view by using a convave lens. This one is concave on both sides, or rather a double concave lens with ground edges. These are also used in classrooms for hands-on instruction in many technical subjects.

* 50 Mm Diameter

* Makes Objects Look Smaller

* Many Visual Applications

* Used In Classrooms

* Excellent Quality