The Rolleidoscop is an early stereo roll-film camera produced by Franke & Heidecke, the Braunschweig firm that later became known for the Rolleiflex twin-lens reflex. It was a niche stereoscopic instrument aimed at amateurs who wanted paired images for stereo viewing rather than single exposures.

Auction data for this model is extremely thin: a single UK hammer result of £850 is on record from 2019, so any present-day value figure for what a Rolleidoscop is worth today rests on that one data point rather than a true range. Because this is a wholesale saleroom price excluding commission, retail asking prices from specialist dealers in 2026 typically sit higher, and condition of the bellows, shutters and matched lens pair drives most of the variation in what examples sell for.