Optics Lens Demonstration Glass – Set of 6: 75mm

 

 

The lenses are of optical glass and are approximately 2.8 inches in diameter. They are good for showing the most important types of lenses. The are optically true with ground glass edges. There are six in the set which include concave, convex, double concave, double convex, plano concave and plano convex. This set is suitable for optics experiments or building homemade magnifiers and telescopes, laser or light experiments, etc. The focal length of the lenses is 6 inches (150mm).