Which telescope product innovation in the 1970s-80s created a new mass market for amateur astronomy by solving the complex alignment problems that previously frustrated casual users?

The telescope market has undergone dramatic transformations since its inception in the 17th century. From simple refracting designs to today's computerized observatories, product innovation in astronomy has opened the universe to professionals and amateurs alike. This trivia question explores a pivotal moment in telescope product development that revolutionized the consumer astronomy market and transformed how everyday people engage with the night sky.

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The Schmidt-Cassegrain compact design
The Dobsonian mount's simple and affordable construction
Meade and Celestron's computerized GoTo technology
The mass production of apochromatic refractors