f/1.2 Noctilux (West Germany) in 1966; for Leica M-series 35 mm RFs.Peres, pp. 314, 780 The Canon FD 55mm f/1.2 AL (Japan) of 1971 was the first rectilinear aspheric SLR lens; for FD mount Canon SLRs,Shell, pp. 106, 178 and the Asahi SMC Takumar 15mm f/3.5 (Japan/West Germany) of 1975 was the first rectilinear aspheric wide angle SLR lens; for M42 screw mount Asahi Pentax SLRs (co-designed with Carl Zeiss [Oberkochen]). The use of modern precision molded plastic or glass aspheric lens elements has made aspheric lenses common today. 1969 Yashica TL Electro X (Japan): first SLR with all solid-state electronic light metering system. Had a stop-down aperture, full area averaging, CdS light meter linked via a four transistor circuit board to an extinguish-both-red-over-and-underexposure-lights exposure control system instead of a galvanometer meter needle. Also had another four transistor timing circuit to electronically control its metal-bladed Copal Square SE focal-plane shutter."Modern Photography's Annual Guide to 47 Top Cameras: Yashica TL Electro-X ITS," p. 123. Modern Photography, Volume 36, Number 12; December 1972. Matanle, p. 184 1969 Asahi (Honeywell in USA) Pentax 6×7 (Japan; name shortened to Pentax 67 in 1990): first 67 medium format SLR. Took ten exposures of 2¼×2¾ inch (6×7 cm) nominal frames (56×69.5 mm actual frames) on 120 film. The 67 format is called "perfect" or "ideal," because its aspect ratio enlarges to an 8×10 inch print without cropping. The Pentax 6×7 resembled a greatly scaled-up 35 mm SLR."Modern Photography's Annual Guide to 47 Top Cameras: Honeywell Pentax 6×7," p. 131. Modern Photography, Volume 36, Number 12; December 1972. 1970s 1970 Mamiya RB67 (Japan): first 67 medium format system SLR. Took ten exposures of 2¼×2¾ inch (6×7 cm) nominal frames (56×69.5 mm actual frames) on 120 film. Also had "revolving" rotatable interchangeable film backs to easily take vertical photographs with the normally horizontal format and standard interchangeable waist level viewfinder.Schneider, "How The Japanese Camera Took Over." p. 86 1971 Asahi SMC Takumar lenses (Japan): first all multicoated (Super-Multi-Coated) lenses for consumer cameras; for M42 screw mount Asahi Pentax SLRs.Comen, Pentax Classic Cameras. pp. 136–137 Process co-developed with Carl Zeiss (Oberkochen, West Germany). Lenses with glass elements "single-coated" with a very thin layer (about 130–140 nanometers) of magnesium or calcium fluoride to suppress flare producing surface reflections were invented by Carl Zeiss (Jena, Germany) in 1936Kingslake, pp. 16–17 and first sold in 1939. They became standard for high quality