A lens for three-dimensional closeups, especially suitable for medical visualization, has been introduced as an attachment to the Exakta Model V or VX 35 mm. camera, having the outside bayonet type of flange onto which the attachment may be fitted. On older models the flange may be replaced at any qualified service shop to accommodate the attachment. Other adjustments can be made as required, according to accompanying instructions.
The device is called the Kin-Dar hypostereo attachment,* "hypo" because the lenses are set at less than normal interocular separation. It is designed for taking stereo pictures at distances of approximately 9 in. and closer. Photographs down to 3 in. from the subject are possible, with a surprising amount of depth even with small aperture shots, although it is best to have backgrounds and foregrounds fairly close to the main subject. The attachment has been planned for precision at fixed distances, so
ZEKMAN TN. Ophthalmologic Use of New Stereo Attachment. AMA Arch Ophthalmol. 1957;57(2):286-287. doi:10.1001/archopht.1957.00930050296022