Which telescope design innovation most significantly expanded the amateur astronomy market by simplifying the user experience for beginners?

The astronomy retail market has transformed dramatically with technological advancements. Modern telescopes represent a fascinating case study in product design evolution, marketing strategy, and consumer demographics. This poll tests your knowledge about a pivotal product design decision that revolutionized the amateur astronomy market and dramatically expanded its customer base. Can you identify the innovation that transformed telescopes from specialist equipment to mainstream consumer products?

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The Schmidt-Cassegrain optical system that reduced telescope length
GoTo computerized mounts with automatic object location
Apochromatic refractor lenses that eliminated chromatic aberration
Carbon fiber tubes that decreased weight and improved portability