It is mainly used for investigating law of image formation and determining focal length of lenses in the middle school. It can also be used for setting up models of microscopes and telescopes.

Specifications:

Parallel light projector: 6~8V, 3W

Lens set: Biconvex lens, F=100mm

Biconvex lens, F=50mm

Flat convex lens: F=300mm

Biconvex lens: F=25mm

Length of the bed: 1000mm