Which product development strategy revolutionized consumer telescopes in the 1970s, making astronomy more accessible to amateurs?

The astronomy industry has seen remarkable advancements in telescope technology over the decades, with each innovation requiring strategic product development and marketing. Major telescope manufacturers have had to balance scientific advancement with consumer accessibility. This poll tests your knowledge about a pivotal moment in telescope product development that transformed both professional and amateur astronomy.

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The Schmidt-Cassegrain design, which allowed for compact, portable telescopes with professional-grade optics
The introduction of digital star charts, eliminating the need for manual celestial navigation
The development of automated tracking mounts that automatically followed celestial objects
The integration of smartphone compatibility, allowing telescopes to be controlled via mobile apps