Exakta Kine Exakta I (round viewfinder) (before war edition)

The Kine Exakta I, introduced in 1936, represents a watershed moment in photographic history as the world's first successful and mass-produced 35mm single-lens reflex camera. Building upon Exakta's earlier 127 roll film SLR models, this innovative adaptation to the compact 135 cartridge format directly addressed the growing demand for smaller, high-quality equipment that would fundamentally reshape professional and amateur photography. The camera's revolutionary design combined through-the-lens viewing with precise focusing via a reflex mirror and ground glass screen, overcoming significant limitations of contemporary waist-level finder cameras. Its metal body construction ensured durability for professional use while the inclusion of interchangeable lenses and viewfinders—including the distinctive round version noted here—provided exceptional flexibility for diverse photographic applications.

The Kine Exakta I's technical innovations extended beyond its SLR design, featuring an ingenious focal plane shutter with variable speeds that accommodated diverse lighting conditions. Its mirror-up mechanism represented a sophisticated solution to minimize vibration during exposure, a design principle that would influence SLR technology for decades. Aimed squarely at professional and advanced amateur markets, the camera embodied a commitment to quality and functionality despite its mechanical complexity. During its pre-war production run, the Kine Exakta gained recognition among pioneering photojournalists and scientists who valued its portability without compromising optical performance. Its direct lineage to the post-war Exakta Varex and other influential SLR systems underscores its foundational role in establishing the 35mm SLR as the definitive format for serious photography. Though production was curtailed by World War II, the Kine Exakta I had already cemented Exakta's reputation as a leader and proven the viability of the 35mm SLR concept for professional work.