Which famous telescope design innovation by Bernhard Schmidt in 1930 eliminated optical aberrations and is now used in many amateur astronomical cameras?

The field of astronomy has been shaped by innovations in telescope design throughout history. These optical instruments have evolved dramatically from simple handheld devices to massive space-based observatories, each iteration bringing new capabilities to astronomers and changing our understanding of the cosmos. This trivia question explores a pivotal moment in telescope product design that revolutionized astronomical research and public engagement with the stars.

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The Schmidt-Cassegrain corrector plate
The Dobsonian mount system
The Ritchey-Chrétien hyperbolic mirror
The Maksutov meniscus lens