Canon celebrates 50th Anniversary

Canon celebrates its 50th Anniversary for First Interchangeable Lens for SLR Cameras. They say that this year marks the 50th anniversary of the release in 1971 of the FD55mm f/1.2AL, it was the company’s first lens for interchangeable-lens SLR cameras. It employs an aspherical lens element and was not only used in the company’s interchangeable-lens SLR cameras but also broadcast lenses, semiconductor lithography systems, telescope mirrors and a wide variety of optical products.

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Aspherical lenses possess a curvature that is ideal for gathering light at a single point. From the f/2.8L IS USM zoom lens series for professional and enthusiast users—the RF15-35mm f/2.8L IS USM (released in September 2019), RF24-70mm f/2.8L IS USM (released in September 2019) and RF70-200mm f/2.8L IS USM (released in November 2019)—to the RF28-70mm f/2L USM (released in December 2018) which realizes a fast f/2 aperture across the entire zoom range, Canon’s aspherical lenses help reduce various types of aberration and achieve high image quality.

Canon celebrates 50th Anniversary

To mass-produce aspherical lenses, Canon needed processing technology that was precise to within less than 0.1 micrometres, as well as high-precision measuring devices that could measure to within 0.01 micrometres. Through repeated cycles of design and processing methods, the company finally succeeded in creating the technology needed to mass-produce aspherical lenses. In March 1971, Canon’s first interchangeable-lens SLR camera employing an aspherical lens was released—the FD55mm f/1.2AL.

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Madhav is a Tech Enthusiast and a Gamer. He also writes for The Automotive Blog, where he covers Auto related news.