Which telescope design is credited with revolutionizing astronomy retail in the 1970s-80s by making serious astronomy accessible to casual consumers through its innovative product design?

The astronomy retail market has evolved dramatically over the decades, with certain product designs revolutionizing how we observe the night sky. One particular telescope design created a paradigm shift in consumer astronomy, transforming it from a niche hobby to a mainstream pursuit. This poll tests your knowledge of product design history in astronomy retail and how one innovation changed the entire customer experience landscape for stargazers.

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The Dobsonian telescope (with its simplified altazimuth mount and portability)
The Schmidt-Cassegrain telescope (with its computerized tracking)
The Maksutov-Cassegrain telescope (with its compact catadioptric design)
The Newtonian reflector (with its equatorial mount and clock drive)