An economical unit for lab or field use. This portable mirror stereoscope is for use with 9” x 9” stereo photographs. It features a 1.2x magnifying unit, and the rugged plastic frame folds to compact size of 2” x 6-1/2” x 14”. Also available is an optional eyepiece with 4x magnification and a 55-75 mm interpupillary adjustment. The field of view is 12° and it has a close-up focus of 150 mm. Constructed of durable plastic to fit precisely on your geoscope.