The Four Thirds System is a standard created by Olympus and Eastman Kodak for digital single-lens reflex camera (DSLR) design and development. Four Thirds refers to both the size of the image sensor (4/3") as well as the aspect ratio (4:3). The Olympus E-1 was the first Four Thirds DSLR, announced and released in 2003. In 2008, Olympus and Panasonic began publicizing the Micro Four Thirds system, a mirrorless camera system which used the same sensor size; by eliminating the reflex mirror, the Micro Four Thirds cameras were significantly smaller than the Four Thirds cameras. The first Micro Four Thirds cameras were released in 2009 and the final Four Thirds cameras were released in 2010; by that time, approximately 15 Four Thirds camera models had been released by Olympus and Panasonic in total. The Four Thirds system was quietly discontinued in 2017, six years after the final cameras were released.
The EF lens mount is the standard lens mount on the Canon EOS family of SLR film and digital cameras. EF stands for "Electro-Focus": automatic focusing on EF lenses is handled by a dedicated electric motor built into the lens. Mechanically, it is a bayonet-style mount, and all communication between camera and lens takes place through electrical contacts; there are no mechanical levers or plungers. The mount was first introduced in 1987.
The Olympus E-1, introduced in 2003, was the first DSLR system camera designed from the ground up for digital photography This contrasts with its contemporaries which offered systems based on reused parts from previous 135 film systems, modified to fit with a sensor size of APS-C.
The Olympus OM System was a line of 35mm single-lens reflex cameras, lenses and accessories sold by Olympus between 1972 and 2002. The system was introduced by Olympus in 1972. The range was designed by Yoshihisa Maitani, chief designer for Olympus, and his staff; OM stands for Olympus Maitani.
The Micro Four Thirds system is a standard released by Olympus Imaging Corporation and Panasonic in 2008, for the design and development of mirrorless interchangeable lens digital cameras, camcorders and lenses. Camera bodies are available from Blackmagic, DJI, JVC, Kodak, Olympus, OM System, Panasonic, Sharp, and Xiaomi. MFT lenses are produced by Cosina Voigtländer, Kowa, Kodak, Mitakon, Olympus, Panasonic, Samyang, Sharp, Sigma, SLR Magic, Tamron, Tokina, TTArtisan, Veydra, Xiaomi, Laowa, Yongnuo, Zonlai, Lensbaby, Venus Optics and 7artisans amongst others.
The Olympus Pen E-P1 announced on 16 June 2009 is Olympus Corporation's first camera that adheres to the Micro Four Thirds (MFT) system design standard. The first camera to use the Micro Four Thirds mount was Panasonic's G-1 camera.
The M.Zuiko Digital 17 mm f/2.8 is a wide-angle, pancake-style prime lens by Olympus Corporation, for the Micro Four Thirds System. It is sold in a kit with the Olympus PEN E-P1 camera body and available separately.
The Panasonic Lumix G 20mm F1.7 lens is a pancake-style prime lens for Micro Four Thirds system cameras. In the Micro Four Thirds format, it is slightly wider than normal. It was the prime-lens option available with the GF1.
The Panasonic Lumix DMC-G3 is a digital mirrorless interchangeable lens camera adhering to the joint Olympus and Panasonic Micro Four Thirds System (MFT) system design standard. The Panasonic Lumix DMC-G3 is the eighth Panasonic MFT camera introduced under the standard and the thirteenth model MFT camera introduced by either Olympus or Panasonic, as of the G3 product announcement date.
The Panasonic Lumix G 14mm F2.5 lens is a pancake-style prime lens for Micro Four Thirds system cameras. In the Micro Four Thirds format, it is moderately wide. As of its late-2010 release, it is claimed by Panasonic to be the lightest interchangeable digital-camera lens. It is the prime-lens option available with the Panasonic GF2 and GF3, and available separately.
The Olympus Corporation M.Zuiko Digital ED 9–18mm f/4-5.6 is a Micro Four Thirds System lens. In the Micro Four Thirds format, it is a zoom ranging from wide to ultra-wide. Like many other Olympus Micro Four Thirds zooms, the front lens elements extend for use, and retract for storage.
The Panasonic Leica DG Summilux 25mmf/1.4 lens is a normal lens for Micro Four Thirds system cameras. It is co-branded between Leica and Panasonic, built in Japan under Leica management.
The Olympus PEN E-P3 announced on 30 June 2011 is Olympus Corporation's seventh camera that adheres to the Micro Four Thirds (MFT) system design standard. The E-P3 succeeds the Olympus PEN E-P2, and was announced in concert with two other models, the Olympus PEN E-PL3, and the Olympus PEN E-PM1.
The Panasonic Lumix G X Vario PZ 45-175mm lensf/4.0-5.6 lens is a zoom lens for Micro Four Thirds system cameras. In the Micro Four Thirds format, it is moderately to long telephoto.
Zuiko is a brand of optical lenses made by Olympus Corporation that was used up to and into the Four Thirds system era. The name Zuiko (瑞光) means 'Holy Light', using a character from the Mizuho Optic Research Laboratory (瑞穂光学研究所), where the lens was developed, and a character from Takachiho Corporation (高千穂製作所), which would eventually become the Olympus Corporation.
The M.Zuiko Digital ED 40–150mm f/2.8 PRO is a professional telephoto zoom lens made by Olympus for the Micro Four Thirds system. It is the first telephoto lens in the Olympus M.Zuiko PRO range, which features weather-sealed, metal construction and high-performance optics intended to accompany the higher-end weather-sealed Olympus OM-D bodies such as the E-M1 Mark II. The lens features an integrated lens function button and manual-focus clutch, and ships with a tripod collar and collapsible lens hood.
Olympus M.Zuiko Digital ED 8 mm f/1.8 Fisheye Pro is an optically corrected fisheye lens.
Olympus M.Zuiko Digital ED 300 mm f/4 IS Pro is an optically corrected telephoto lens. With its extreme focal length of 300 millimetres it is the refracting prime lens with the longest focal length of the Micro Four Thirds system.
The M.Zuiko Digital 17 mm f/1.8 is a prime lens by Olympus Corporation, for the Micro Four Thirds System. Originally introduced in 2012, the lens features a silent movies and still compatible focusing motor. The lens, like other Olympus lenses, can switch from auto focus to manual focus by pulling back in its focusing ring.
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