The Horne & Thornthwaite Collapsible camera is a 19th-century British wooden field camera produced by the London optical and photographic instrument firm Horne & Thornthwaite. As a collapsible plate camera, it folds for transport and was sold during the early decades of photography for use with sensitised glass plates.

Survival examples of this maker are scarce, and the only documented UK auction reference in our records is a single Christie's hammer result of £9,400 from December 2002 — a wholesale saleroom price rather than a retail figure. With just one historical data point, today's value of a Horne & Thornthwaite Collapsible camera is highly condition- and provenance-sensitive, and what one sells for at auction in 2026 would depend heavily on completeness, originality of fittings and the strength of bidding on the day.