Extremely Large, Extremely Expensive: The Race for the Next Giant Telescopes - The New York Times
Obsession Telescopes / Optics
Amazon.com : Telescopes for Adults, 70mm Aperture and 700mm Focal Length Professional Astronomy Refractor Telescope for Kids and Beginners - with EQ Mount, 2 Plossl Eyepieces and Smartphone Adapter : Electronics
PW1000 Observatory System
Cost versus aperture diameter for optical telescopes built before and... | Download Scientific Diagram
PlaneWave 1 Meter Observatory Telescope | OPT Telescopes