Highslide JS
Early depiction of a "Dutch telescope" from 1624 — Composed of a convex and a concave lens, these so-called Dutch telescopes do not invert the image.
Photo Credit: By Adriaen van de Venne - http://www.phys.uu.nl/~vgent/telescope/telescopenl.htm, Public Domain, https://commons.wikimedia.org/w/index.php?curid=6286037