Which telescope company revolutionized the consumer astronomy market in the 1970s with their 'Dobsonian' design that dramatically reduced costs while maintaining quality for amateur astronomers?

The astronomy equipment market has seen fierce competition over decades, with companies striving to innovate and capture the imaginations of both amateur stargazers and professional astronomers. One particular corporate rivalry fundamentally changed how consumers access the stars. Test your knowledge about this significant chapter in astronomy retail history that democratized stargazing for millions worldwide.

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Celestron, with their 'Orange Tube' C8 Schmidt-Cassegrain telescopes
Orion Telescopes & Binoculars, who mass-produced and popularized John Dobson's design
Meade Instruments, with their LX series computerized mounts
Bushnell, who introduced their low-cost 'Voyager' line of reflector telescopes