dual viewfinders. Development of this camera began in 1975 and a prototype was exhibited at photokina 1978. One year later, however, the project was suspended due to lack of funding, although it was eventually resumed and completed. The features that were borrowed from Rollei's medium format cameras certainly attracted interest, but the high price and limited range of accessories put off many potential buyers, even though a full range of lenses with focal lengths from 14 mm to 1000 mm was available. An improved version, the Rolleiflex 3003, was introduced at photokina 1984. Rollei eventually withdrew from the SLR market in 1994. By this time, all 35 mm SLRs included autofocus as a standard feature and Rollei was simply no longer able to keep up. The high price of the SL 2000F / 3003 range meant that it only ever appealed to serious amateurs, with the result that only 15,000 units were sold. Rollei Metric In 1986, Rollei started making metric surveying systems. This project was instigated by , a research associate at Rollei who wanted a camera adapted for the purpose of photogrammetry. Accordingly, especially calibrated cameras were developed along with computer programmes to analyse the resultant images: the 35 metric, the 3003 metric and the 6006 metric cameras incorporated a glass plate in front of the back plane inscribed with grid lines which – as famously shown on the photographs taken during the Apollo moon missions – were visible on the photographic image. Rollei's system was substantially cheaper than other high-end systems of the time. There was close collaboration with the Braunschweig University of Technology on this project. "Classic" project Interest in twin-lens Rollei cameras declined in the 1970s so much that the Rolleicord was discontinued in 1976, while the Rolleiflex was only available on special order from 1977. Although there was some revival in interest shortly thereafter, production ceased altogether after Rollei went into voluntary administration. Nonetheless, 1,250 gold-plated Rolleiflexes were assembled in 1982 from the remaining componentry and sold as the 2.8F Gold for 4,000 DM. In 1987, a much-admired successor, the Rolleiflex 2.8 GX, was released which naturally featured the latest in TTL and flash metering. The 2.8 GX sold for 2,800 DM, which was not exactly cheap, but a reasonable price considering the low production volumes. Rollei then introduced the 2.8 FX in 2001, a modernised version featuring the Rolleiflex logo of the 1930s.