The Bolex H16 Rex 4 is a 16mm spring-wound cine camera from the Swiss-made H16 Reflex series, fitted with a reflex viewing prism and a three-lens C-mount turret. It sits within the H16 Reflex lineage aimed at advanced amateur and professional documentary, educational and independent filmmakers.

Sales evidence for the H16 Rex 4 is thin: a single UK auction hammer result on file in 2012 sold for £340, which gives an indicative wholesale level rather than a reliable current market price. With only one data point, the price a Rex 4 sells for today depends heavily on cosmetic condition, mechanical health and whether lenses are included, so 2026 values should be confirmed against fresh comparable sales before relying on this figure.