The Thornton-Pickard Praetor is a British-made plate camera from the early 20th century, produced by Thornton-Pickard Manufacturing Co. of Altrincham. It is a wood-and-brass folding plate camera typical of the era, aimed at amateur and professional photographers using glass plates.

Sales data for the Praetor today is extremely thin: a single 2017 UK auction hammer result of £168 is the only verified data point, so any sense of what one is worth must be drawn from that lone figure rather than a true range. At saleroom level, wood-and-brass Thornton-Pickard plate cameras of this period typically sell for modest sums, and condition of the bellows, shutter and woodwork is the dominant factor in what an example sells for.