lenses and large accessory system. Note that the initial production batches were marked as the M-1, but this designation was quickly changed when E. Leitz objected over conflicts with their Leica M-series RFs trademarks."Modern Photography's Annual Guide to 47 Top Cameras: Olympus M-1," p. 119. Modern Photography, Volume 36, Number 12; December 1972. Wade, Collector's Guide. pp. 159–160 M-1 marked cameras are currently a collector's item SLR. 1972 Polaroid SX-70 (USA): first instant film SLR. Had non-pentaprism mirror reflex system and electronic autoexposure in flat-folding body with bellows and fixed 116mm f/8 lens. Took ten exposure, 3⅛×3⅛ inch frame Polaroid SX-70 instant film packs.Herbert Keppler, "SLR: It's the 25th anniversary of an instant classic, the most incredible, most ingenious SLR ever invented. And here it comes again!" pp. 17–18, 20. Popular Photography, Volume 61, Number 10; October 1997. Wade, Collector's Guide. pp. 134–135 The principle of self-developing "instant photography" came to Edwin Land in 1943. The first production instant camera was the non-SLR Polaroid Land Model 95 (USA) of 1948, producing sepia-toned, peel-apart pictures.Weston Andrews, "Instant Pictures: 40 Years of Instant Success; From the sepia-tone print to the see-through Spectra, Polaroid's story is a saga of invention and innovation…with just a few slight detours." pp. 54–55, 94. Modern Photography, Volume 51, Number 10; October 1987. Wade, Short History. p. 105 Steady improvements culminated in the seven-year, nearly quarter-billion dollar SX-70 camera and film project to create full-color, self-contained, develop-before-your-eyes, "garbage-free" prints.William Doerner, "Polaroid's Big Gamble on Small Cameras," pp. cover, 80–82, 84, 86, 88. TIME, Volume 99, Number 26; 26 June 1972. 1974 Vivitar Series 1 70–210mm f/3.5 (USA/Japan): first professional-level quality close focusing "macro" zoom lens for 35 mm SLRs.Herbert Keppler, "Keppler's SLR Notebook: Good Grief! Three Series 1 70–210 Vivitar Zooms?" pp. 35, 74. Modern Photography, Volume 48, Number 8; August 1984. Early zoom lenses often had very inferior optical quality compared to prime lenses,Jason Schneider, "The Camera Collector: Auto and match-needle exposure, instant-return mirror and diaphragm plus full finder information in an early-60s SLR? Alas, it was too good to be really reliable." pp. 24, 26, 28, 32, 34, 144. Modern Photography, Volume 45, Number 9; September 1981. but improvements in computer assisted zoom lens design and construction allowed annual Japanese 35 mm SLR zoom lens production to surpass prime lenses in 1982 and zooms became normal on virtually all but the highest end still cameras by