Predating the Stereo Realist by two years the Haneel Tri-Vision was the first attempt at “stereo for all”, with a $37 price for camera and viewer. The Haneel was preceded by the Ultra Rare Kirk Stereo Camera, similar in all ways except all knobs and fittings are Bakelite instead of Aluminum. Using 828 film, advance and spacing is controlled by reading different frame numbers through different openings on the back. Very lightweight, and a delight to hold in hand. The lenses are “said” to be 2 element coated achromats but appear to be single element by reflection. The little manual really suggest using F 16 as often as possible! The two shutter buttons are interesting, to make an instant photo exposure, just press right button. To make time exposure, set camera on flat surface (or tripod), push down left button, hold and then push right. When exposure is done, release left button to close shutter. The camera is optimized for 7-12’ shots. Note the lens separation is closer than all “Realist format” cameras, allowing better close work. You get 6 sets of images. Along with the camera and viewer, Haneel supplied special plastic “sleeves” that you slipped the image chips into. In viewing the various patents for these items, work began on the design about 1940. The KIRK came out about 1942-43, and was “pat. pending”. I do think the KIRK was made by the inventor, Sparling, and Not initially by Haneel (who improved the design). The was patent number marked , and marketed beginning 1945. By mid 1946 Haneel was in deep financial trouble and production ceased. The “doings” financially were very convoluted and fishy, making for a case which went to the Supreme Court. The US Navy had bought $14,000 worth of these cameras (over 300) for the Hawaii USN “px’s“ and got them in two shipments. The check was cashed in a fishy manner and well..... troubles began. •••• Anyway a Sweetheart of a Camera, a challenge to collect (6 varieties) and using rerolled 35mm film into 828 rolls/backing paper, very useable! If you ever see 828 slides of Hawaii, you know it was taken with one of those cameras. Many Haneel seen today have cracks at tge front corners.
oddly, this would not affect images as the inside chamber is lightproof .