In fact, a wide-angled version of this camera is available once more. So, the number of Rollei cameras produced increased yet further – albeit slowly – reaching a total of 3.2 million units. Similarly, a classic version of the Rollei 35 was available for a period of time: the Rollei 35 classic was presented at photokina 1990 and sold for 2,200 DM with a flash unit. See Rollei 35. Rollei 35 RF Following a trend towards rangefinder cameras, Rollei introduced the Rollei 35 RF in 2002. Yet the 35 RF was neither developed by Rollei, nor was it based on any of the earlier variants of the Rollei 35. Instead, it was derived from the Cosina Bessa Rx, a rangefinder camera that was sold as the Voigtländer Bessa R2. Like the Voigtländer Bessa Rx and Zeiss Ikon cameras from Cosina, it utilised a bayonet lens mount derived from the Leica M3. Rollei offered three lenses of its own design made by Zeiss. The Rollei 35 RF is no longer in production, and it appears that not many were sold. Prego cameras Despite an earlier resolution to avoid the mass market, Rollei began to sell a range of viewfinder cameras for the amateur market. The cameras were made in Asia by Skanhex, Premier, Kyocera and Ricoh, among others, and sold under the brand name Rollei Prego. The product line initially consisted solely of 35 mm cameras; digital cameras were added later on – Rollei even began to develop these itself. Single-lens medium format systems Single-lens medium format cameras represented Rollei's most important market segment. Consequently, development of the SLX continued, resulting in the 6006 which was introduced in 1984. Significant improvements included a film magazine and TTL flash metering – superior technology that made it the leading medium format camera. The 6002 followed in 1986, an entry-level model without a film magazine along with three inexpensive lenses (f/4, 50 mm; f/2.8, 80 mm; f/4, 150 mm). For the first time Rollei offered low-cost lenses from Asia, although all of the other lenses were still made by Schneider and Zeiss. In 1988, Rollei introduced the 6008. In addition to improved electronics, this was the first medium format camera to include automatic exposure bracketing; demand for this feature was so great that it led to a five-month lead time. The 6008 SRC 1000 was introduced in 1992, which made exposures of 1/1000 second