Which telescope design, introduced in 1970, revolutionized amateur astronomy with its compact 'grab-and-go' portability while creating one of the strongest brand positions in astronomical equipment?

Throughout astronomy's history, certain telescope brands have dominated the market by positioning themselves uniquely. The right telescope can transform amateur stargazing into serious astronomy, and manufacturers know this. This poll tests your knowledge about how a revolutionary telescope design changed both the industry landscape and amateur astronomy forever, creating one of the most distinctive brand positions in astronomical equipment history.

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Dobsonian reflector by John Dobson
Schmidt-Cassegrain by Celestron
Maksutov-Cassegrain by Questar
Short-tube refractor by Tele Vue