The old observatory has a bunch of telescopes, a few very old and some newer. Also our collection is growing!

• 6"
• 10"
• Astrograph
• Zunderman reflector
• Huygens telescope
• Reflector visitors desk
• Minnaert Telescopes
• Heliostat
• Student Telescope (West Dome)
• WLS Telescope(s) (East Dome)

• WLS Portable Telescopes
• Solar Hα-telescope
• Sextants
• SMART Radio Telescope
• Bresser Skylux
• Pyroheliometer

• Meridian transit circle
• Zenith telescope (Talcott)
• Reflector by Rienks&Roelofs
• van der Wall reflector
• Huff Telescope
• Quadrant Snellius
• Telescopes abroad
• Radio telescopes
• Telescopes in space
• Land Surveying tools

Many of the historic telescopes preserved by Kaiser, were donated by de Sitter in 1930 to Museum Boerhaave. Catalog