The Cornu Ontoscope Reflex is a French-made reflex camera from the Cornu workshop in Paris. As a niche product from a small French manufacturer, it sits well outside the mainstream of mass-produced reflex cameras and tends to surface only occasionally on the collector market.

With only a single tracked UK auction-hammer result available, pricing reference for the Ontoscope Reflex is thin: one example sold for £800 in 2019, and that figure is the only datapoint shaping any sense of what one is worth today in 2026. Because the sample size is so small, the price a given example sells for at saleroom level can swing significantly with condition, completeness and bidder interest on the day.