Which product design innovation, introduced by Celestron in the 1970s, revolutionized the consumer telescope market by making powerful telescopes more compact and affordable for amateur astronomers?

The astronomy equipment market has undergone remarkable transformations in product design and marketing strategy over the decades. From traditional optical telescopes to modern digital astronomy tools, companies have employed various innovative approaches to reach amateur astronomers and professionals alike. This trivia question focuses on a pivotal product design decision that revolutionized the consumer telescope market and made astronomy more accessible to everyday enthusiasts.

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Schmidt-Cassegrain optical design
Motorized equatorial mounts
Integrated smartphone adapters
Computerized GoTo navigation systems