How did the Kodak Brownie manage to function without a complex focusing mechanism?

Answer

It utilized a fixed aperture and shutter speed

The Brownie was engineered for extreme simplicity, eschewing complex adjustments that would intimidate novice users. By employing a fixed aperture and a set shutter speed, the camera was designed so that, under reasonably bright daylight conditions, the user could reliably capture a usable image without needing to calculate exposures or manually focus the lens. This ensured high success rates for amateur photographers who had no previous experience.

How did the Kodak Brownie manage to function without a complex focusing mechanism?
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