Stereoscopic photographs and stereoscopes

Two images create an impression of depth

A stereoscopic photograph consists of two views of the same subject taken from slightly different positions. A stereoscope presents one image to each eye, making the pair appear as a single scene with depth. The stereoscope is the viewing instrument; a stereo card carries the images. Two identical copies placed side by side are not an equivalent stereo pair.

Features and variations

Many older stereographs are paired on stiff card. Others use materials including glass. Stereoscopic photography describes how a subject is represented and viewed, rather than a single photographic process. Even daguerreotypes could be stereoscopic. A doubled scene alone does not establish material or age.

Examine the complete set

Record both image areas, captions, publisher, series numbers and any case. Distinguish a printed publisher's name from the photographer's identity. Practical example: Photograph the case and card order before dividing a collection. Note loose parts and damage to the viewer, and never force a card into an unsuitable holder.

Next steps

Browse cameras and photographic equipment for related objects. If you have an old viewer with its images, send OBA overview photographs and request a purchase offer. Include marks and packaging.