10 and 12 researched events on one shared scale. Canon 1933–present, Topcon 1932–present.
The axis stretches where either maker has research and collapses where neither does, so a year sits opposite the same year on both. Event counts differ because research depth differs, not because one company did less.
Tokyo Kogaku Kikai Kabushikikaisha was established in September 1932 from K. Hattori's surveying-instrument operation and lens facilities acquired from Katsuma Kogaku Kikai. It began with surveying instruments, binoculars, cameras, and military optics, then moved its head office and main works to Itabashi in April 1933.
Goro Yoshida, Saburo Uchida, and Takeo Maeda established the Precision Optical Instruments Laboratory in Tokyo in November 1933 to develop a high-grade 35mm camera. The Kwanon was a prototype, not a regular commercial line. The Hansa Canon reached the market in February 1936 under a joint arrangement: Nippon Kogaku supplied the Nikkor lens, mount, viewfinder optics, and rangefinder mechanism, while Canon's predecessor made the body and shutter and assembled the camera.
The History of Canon, 1933-1961 · Canon Camera Museum: The Birth of Canon · Hansa Canon (Standard Model)
The business was incorporated as Precision Optical Industry Co., Ltd. on 10 August 1937. It developed the Serenar lens and began moving toward internal optical production. Wartime disruption damaged facilities and constrained materials, but the company received permission on 1 October 1945 to resume camera manufacture. Canon's current corporate founding date refers to the 1937 incorporation, not the laboratory's 1933 beginning.
The History of Canon, 1933-1961 · Canon Camera Museum: 1937-1945 · Canon Basic Information
The 6×4.5cm Lord entered production in July 1937 as Tokyo Kogaku's first civilian camera, but wartime conditions limited it to roughly fifty examples. The folding Minion followed in 1938, while the wider works concentrated on surveying, binocular, aerial-camera, and military optical production until the factory closed briefly at the war's end.
Authorized to resume civilian work in November 1945, Tokyo Kogaku exported binoculars and restarted cameras from surviving Minion parts. The Minion 35 appeared in 1948, domestic camera sales resumed in limited form in 1949, and ophthalmic instruments began in 1947. This diversified reconstruction led directly to the Topcon 35 in 1953.
Postwar cameras initially appeared with either Serenar or Nikkor standard lenses because materials and production were still unsettled. Canon expanded in-house Serenar manufacture, and Nippon Kogaku stopped supplying Nikkor lenses in 1948. Precision Optical Industry became Canon Camera Co., Inc. in 1947. Rangefinders supported export growth while Canon began to build capabilities in cine cameras, broadcast lenses, and business equipment.
The History of Canon, 1933-1961 · Canon Camera Museum: 1937-1945 · Canon Camera Museum: Overcoming Postwar Difficulties
Primoflex twin-lens reflex cameras, the Topcon 35 rangefinder family, and Topcor lenses turned photography into Tokyo Kogaku's leading postwar business. The 1957 Topcon R opened a professional 35mm SLR line, while the company-designed Topcon Horseman 960 of 1959 began a long-running large-format branch that outlasted the small cameras.
1932-1969 · カメラの歴史で振り返る、高度経済成長期のトプコン · Company Profile: Topcon
The Canonflex of 1959 introduced the R-mount SLR line. The FL mount followed in 1964 with stopped-down TTL metering and retained the breech-lock concept. Canon developed large synthetic fluorite crystals and released the FL-F300mm f/5.6 in May 1969. The company also diversified into calculators and copying technology and changed its legal name to Canon Inc. on 1 March 1969 to reflect a business no longer limited to cameras.
Canon Camera Museum: 1955-1969 · The Evolution of the Canon Lens Mount · Fluorite Lenses: Corrective Capabilities Beyond Ordinary Optical Glass
After becoming an affiliate of Tokyo Shibaura Electric in 1960, Tokyo Kogaku widened its camera program. The Topcon PR was Japan's first domestic lens-shutter 35mm SLR, and the 1962 Topcon RS answered a development request from American distributor Beseler. These cameras prepared the separate leaf-shutter and UV-mount branch.
1932-1969 · カメラの歴史で振り返る、高度経済成長期のトプコン · Company Profile: Topcon
The Topcon RE Super brought built-in TTL full-aperture metering to a production 35mm SLR in 1963. Slits in the reflex mirror fed a cell behind it, while the RE Auto-Topcor lens relayed aperture information to the body. The 1964 Topcon Uni extended mirror-meter thinking to an interchangeable-lens, lens-shutter SLR.
1932-1969 · The first single-lens reflex camera to have a built-in TTL open aperture exposure meter · Systematic Survey on 35 mm High End Camera
Tokyo Kogaku developed two distinct SLR paths: the professional RE family with RE Auto-Topcor lenses on its Exakta-derived bayonet, and the lens-shutter UV family that culminated in the Unirex. Beseler names on American-market bodies and later outside-made RE and K-mount products make engraving, interface, and maker attribution separate questions.
カメラの歴史で振り返る、高度経済成長期のトプコン · Company Profile: Topcon · Topcon RE Super
A Fukushima production company was formed in 1969, followed by service and sales subsidiaries in Europe and the United States in 1970 and Singapore in 1979. As ophthalmic and electronic surveying instruments reshaped the business, Topcon ended sales of 35mm cameras in December 1980; Horseman large-format production continued.
Canon introduced the FD system and professional F-1 in 1971. FD retained the earlier breech-lock physical concept but added full-aperture metering and information exchange intended for automatic exposure. Fourteen FD lenses appeared together at launch, and the wider F-1 system was supported by more than 180 accessories. Canon simultaneously expanded plain-paper copying, laser printing research, overseas production, and semiconductor lithography.
Canon Camera Museum: 1970-1975 · The Evolution of the Canon Lens Mount · Canon F-1
The AE-1 of 1976 integrated a CPU into a mass-market 35mm SLR and was followed by the multi-mode A-1. New FD lenses appeared in 1979 with a faster fit-and-lock action while retaining interchangeability with earlier FD bodies. The T80 of 1985 provided a limited autofocus transition through dedicated AC lenses, but Canon concluded that a more extensive electronic system would require a new mount. Canon also began supplying laser-printer engines to Hewlett-Packard during this period.
Canon Camera Museum: 1976-1986 · The Evolution of the Canon Lens Mount · The History of Canon, 1976-1987
Successful electronic distance meters and the RM-100 refractometer accelerated Tokyo Kogaku's transition into an optomechatronics company. The first overseas production base opened in Hong Kong in 1986. In April 1989 the business adopted Topcon Corporation as its legal name, elevating the familiar camera trademark to corporate identity.
Canon launched the EOS 650 and EF lenses in March 1987. EF replaced mechanical lens-body couplings with electronic communication, located the autofocus motor in each lens, and was not natively compatible with FD. The EOS-1 of 1989 extended the system into professional use. EF manufacturing expanded through Japan, Taiwan, and Malaysia, while Canon developed digital cameras and early professional digital SLR products around the EOS architecture.
Canon Camera Museum: Leap Forward with the EOS, 1987-1991 · The Evolution of the Canon Lens Mount · Canon Taiwan to Boost Lens Production Capability · Canon EOS 650 / EOS 650 QD
Topcon transferred Horseman camera manufacturing operations in March 1992, completing its withdrawal from cameras. The continuing company expanded instead through machine-control and precision-GPS acquisitions, introduced combined retinal and tomographic imaging, and made Sokkia a subsidiary, carrying precision optics into positioning and eye care.
The EOS D30, marketed in October 2000, paired the EF system with a Canon-developed 3.25-megapixel CMOS sensor and Canon signal processing. The EOS-1D and full-frame EOS-1Ds brought the digital system to professional work, while the lower-priced EOS 300D widened access. EF-S added APS-C-specific lenses within the EOS SLR family. Canon continued selling the EOS-1V film body until 2018, although an official sales-end notice does not establish its final production month.
Canon Camera Museum: 1997-2000 · Canon Camera Museum: A Vibrant Evolution in Digital Imaging, 2001-2004 · Canon EOS D30 · Notice of End of Sales and Extended Repair Support for the EOS-1V
Topcon concentrated resources on positioning, eye care, and agricultural automation, combining optical instruments with software, connectivity, and machine control. Fully automatic OCT imaging, construction guidance, GNSS, and digital agriculture show how the same precision-measurement tradition continued after consumer cameras had left the product range.
The EOS M of 2012 introduced the separate EF-M mirrorless mount for APS-C cameras and dedicated EF-M lenses. Canon also developed Cinema EOS and continued to expand digital SLR and professional video systems. The corporate group broadened further into network cameras and medical systems. No clear Canon announcement found in this search assigns one formal end date to the entire EOS M system.
Canon Integrated Report 2026 · Canon Camera Museum: 2011-2015
Canon launched the full-frame EOS R system in 2018. The RF mount retains a 54mm internal diameter but shortens the flange distance to 20mm and uses a 12-contact electronic interface. Canon adapters support EF and EF-S lenses on RF bodies, but RF and EF-M remain separate native systems. Canon Inc. continues to operate across printing, imaging, medical, and industrial businesses, with lens and lithography production centered in a global manufacturing network.
Canon Launches the EOS R System · EOS R System White Paper · Canon Basic Information · Canon Manufacturing Facilities · Canon Integrated Report 2026 · Canon Reaches 110 Million EOS Cameras and 160 Million RF/EF Lenses
A management buyout backed by KKR and JIC Capital took Topcon private, and its shares were delisted on December 2, 2025. Current management remained in place while the company pursued longer-term investment in healthcare, agriculture, and infrastructure. The operating manufacturer continues from its historic Itabashi base.
Topcon Corporation Completes MBO, Launching the Company's Next Chapter · Corporate Profile
