The Rollei P11 is a medium format slide projector designed to handle both 6x6cm and 35mm transparencies via interchangeable carriers. It is a piece of presentation equipment rather than a camera, used to project mounted slides onto a screen.

Sales data is extremely limited, with a single recorded UK auction hammer result of £75 in March 2023, indicating a wholesale saleroom value in that vicinity for a working example today. Because only one data point exists, what a P11 is worth in the wider market can vary considerably with completeness, working condition, and the presence of original lenses and slide magazines, so the price a given example sells for may sit either side of that figure.