Canon FD lens mount
standard lens mount on analog Canon 35mm SLR cameras with manual focus; was replaced by mount for autofocus lenses
The Canon FD lens mount is a physical standard for connecting a photographic lens to a 35mm single-lens reflex camera body. The standard was developed by Canon of Japan and was introduced in March 1971 with the Canon F-1 camera. It served as the Canon SLR interchangeable lens mounting system until the 1987 introduction of the Canon EOS series cameras, which use the newer EF lens mount. The FD mount lingered through the release of the 1990 Canon T60, the last camera introduced in the FD system, and the end of the Canon New F-1 product cycle in 1992.
Overview
The FD mount is mechanically compatible with and replaced Canon's earlier FL mount, which in turn had replaced the R mount; FD-mount cameras can use FL lenses in stop-down metering mode and R lenses will mount, but must be used with manual aperture and stop-down metering.
Though never officially explained by Canon, others have attempted to assign a meaning to the "FD" designation. One such attempt states that the "FD" notation stands for "Focal-plane shutter with Dual linkage for diaphragm control"; in actuality, there were two linkages and two signals: the automatic aperture lever, aperture signal lever, full aperture signal pin, and automatic exposure lock pin. This is twice the previous lens series, which used the "FL" designation, said to mean "Focal-plane shutter, Linked mount."
Over the 21-plus years of production, Canon introduced 134 different FD lenses ranging from 7.5mm through 1,200mm in seventeen different fixed focal lengths and nineteen different zoom ranges, one of the most, if not the most, extensive manual focus lens lines ever produced.
The Canon FD system enjoyed huge popularity in the 1970s and 1980s, when it established and grew a market share with professional photographers as well as having equipped over a million consumer users. Indeed, sales of the Canon AE-1 camera alone exceeded one million.
Begin with the source’s own compact description: “Canon FD lens mount” is standard lens mount on analog Canon 35mm SLR cameras with manual focus; was replaced by mount for autofocus lenses. The dossier treats that line as a proposition to test through Canon, lens and mount, not as a finished interpretation.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 10, 2026. The linked authority identifier is Q209659. None of the 1 selected statements returned an explicit reference. The first chronological checks are 1971, 1987, 1990 and 1992.
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This entry incorporates text from “Canon FD lens mount” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.