Polaroid Corporation it had asked for. In 1977, Land introduced the Polaroid Instant Home Movie camera named Polavision, based on the Dufaycolor process. However, the product arrived on the market when videotape-based systems were rapidly gaining popularity. Thus it failed to sell well in retail stores and has been described as the swan song for Polaroid. After four decades as chairman, Edwin Land was coerced into resigning and leaving the corporation he had founded. He died in 1991. The "Polavision" debacle eventually caused the company to write off $89 million, including most of the manufactured products. The underlying technology of Polavision was
Camera fixed format. With some systems it was also possible to create an instant image negative, from which then could be made copies in the photo lab. The ultimate development was the SX-70 system of Polaroid, in which a row of ten shots – engine driven – could be made without having to remove any cover sheets from the picture. There were instant cameras for a variety of formats, as well as cartridges with instant film for normal system cameras. In the single-lens reflex camera, the photographer sees the scene through the camera lens. This avoids the problem of parallax which