Which telescope product innovation by Celestron in the 1970s dramatically reduced manufacturing costs and made advanced astronomy accessible to the general public?

The telescope has transformed astronomy from ancient times to modern space exploration. This poll explores a pivotal moment in telescope product development that revolutionized our understanding of the cosmos. Test your knowledge about how commercial innovation in astronomical equipment changed our view of the universe and created an entirely new market for both professional and amateur astronomers.

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Schmidt-Cassegrain design with computer-controlled manufacturing
Digital eyepiece integration with photographic capabilities
Automated star-tracking motor drive systems
Lightweight carbon fiber telescope tubes