How to Make a Simple Refracting Telescope (Monocular)

This video shows how to build a simple refracting telescope, also called a monocular or a spyglass, using two lenses. One lens is double convex (converging) and one is double concave (diverging). This results in a magnified right-side-up image instead of the inverted image you get when using two double convex lenses. This telescope is easy for young kids to build since it does not require a third lens or prism to give a non-inverted image. Written instructions to make the telescope and links to purchase the lenses are available on the Science Buddies website: https://www.sciencebuddies.org/stem-activities/build-a-telescope