Which product design innovation, introduced by Celestron in the 1970s, revolutionized telescope accessibility and is now standard in most consumer telescopes?

The astronomy product market has evolved dramatically in recent decades, with innovations in telescope design, digital imaging, and consumer accessibility transforming how we observe the cosmos. From traditional optical telescopes to advanced computerized systems with smartphone integration, manufacturers have revolutionized how amateur astronomers interact with the night sky. Test your knowledge about a famous product design choice that changed amateur astronomy forever!

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Schmidt-Cassegrain optical design
GoTo computerized mounts
Apochromatic refractor lenses
CMOS imaging sensors