APM Telescopes. 1964 Standard Questar 3.5" Maksutov Cassegrain Telescope
Questar Duplex 3.5-inch Telescope with Optional Zerodur Mirror, Broadband Coatings, Powerguide and Quartz Drive
Finally bought a Questar : r/telescopes
Long Distance Microscope QUESTAR | Contact POLYTEC FRANCE
APM Telescopes. Questar Duplex 3,5" Teleskop mit Pyrex Spiegel with Magnesium Fluorid Coating
New to this group. Just thought I would share my best flip I ever had about 1 1/2 years ago. Rare Vintage Questar 3.5" Telescope, & Case, manual, 4 lenses, And Tripod
Questar Corporation - Wikipedia
Company Seven | Introduction to Selecting a Questar 3-½ Astronomical Telescope
RainyDayScience: Questar Tristand FirstLook by Wan Chi Lau September 13, 2013
Questar 3.5...A special find - Classic Telescopes - Cloudy Nights
Company Seven | Questar 50th Anniversary Telescope Page