Which amateur astronomer revolutionized telescope design in the 1960s by creating a simple, low-cost alt-azimuth mounted reflector telescope that dramatically increased aperture-to-cost ratio?

Product design innovation has dramatically shaped modern astronomy, making the cosmos accessible to amateurs and professionals alike. One particular design revolution democratized astronomy in ways that continue to impact the field today. Test your knowledge of this pivotal product innovation that changed how we explore the night sky!

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John Dobson, whose 'Dobsonian' design made large aperture telescopes affordable for amateur astronomers
Clyde Tombaugh, who created the 'Tombaugh Reflector' that simplified the traditional Cassegrain design
George Ellery Hale, whose 'Hale Portable' design made observatory-quality optics available to the public
Edwin Hubble, whose 'Hubble Compact' design reduced the complexity and cost of Schmidt-Cassegrain telescopes