The Leitz Single-Exposure is a prototype camera attributed to Leitz, produced as a one-off or experimental unit rather than a series-production model. As a prototype it was never offered through normal retail channels, so its positioning was internal or developmental rather than commercial.

With only one recorded result in the data — a £30,000 hammer at UK auction in 2019 — the price reference for what a Leitz Single-Exposure prototype is worth today rests on a single data point, and any future sale could move materially in either direction. At saleroom level, prototypes of this kind are condition- and provenance-driven, and value is highly sensitive to documentation tying the camera to Leitz. As of 2026, no further public hammer results are available to refine that figure.