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Canon EOS
Canon EOS (Electro-Optical System) is a series of system cameras with autofocus capabilities produced by Canon Inc. The brand was introduced in 1987 with the Canon EOS 650, a single-lens reflex camera. All EOS cameras used 35 mm or APS-format film until Canon introduced the EOS D30, the company's first in-house digital single-lens reflex camera, in 2000. Since 2005, all newly announced EOS cameras have used digital image sensors rather than film, with EOS mirrorless cameras entering the product line in 2012. Since 2020, all newly announced EOS cameras have been mirrorless systems.
EOS cameras are primarily characterized by boxy black camera bodies with curved horizontal grips; the design language has remained largely unchanged since the brand's inception. The EOS series previously competed primarily with Nikon SLR cameras and as of September 2025[update] primarily competes with Sony mirrorless cameras. The series was conceived as a camera system built around autofocus capabilities.
The EOS series was introduced alongside the electrically-driven and autofocus-centered EF lens mount, which replaced the previous mechanically-driven and primarily manual-focus FD lens mount. The EF mount and its variants were the primary lens mounts for EOS cameras for decades, eventually being replaced by the RF lens mount in 2018, which was designed for mirrorless cameras and has now become the standard lens mount for EOS-branded cameras.
Canon first experimented with autofocus in 1985 with the T80, a single-lens reflex camera that utilized 135 film. The T80 featured Canon's existing FD lens mount, designed for manual focus, with the addition of electrical contacts that allowed communication between the camera body and focusing motors within the attached lens. This system, wherein the lens focuses itself using information from the camera body, was promising enough for Canon to continue development on a more refined version, despite Canon's internal dissatisfaction with the T80's autofocus performance when compared to Nikon and Minolta's autofocus cameras.
The EOS system was based on this principle and was introduced in 1987 with the Canon EOS 650. The camera broke compatibility with the FD lens mount by fully removing all mechanical linkages between the moving parts in the lens and in the camera: like the T80, the correct aperture and focus are determined by the camera body and transmitted electronically to the lens, which makes the required adjustments using internal motors. Canon named this new lens mount the EF mount, short for "Electro-Focus". Alongside the bayonet-style lens mount, the EOS 650 featured a new focusing sensor and a high-performance microprocessor, and was paired with lenses with ultrasonic motors—the first instance of this technology being used for consumer photography. According to Popular Mechanics, the EOS 650 and the improved EOS 620 had the fastest autofocus performance of any camera available in the year they were released.
In 1989, Canon released the first EOS camera marketed to professionals, the EOS-1. The camera was intended to compete with the Nikon F4 released one year prior. The EOS-1 was released in tandem with new professional-grade lenses for the EF mount and established the EOS-1 series of cameras.
The EOS 1000 followed in 1990; this became the EOS line's first successful budget SLR, as Canon's previous attempts with the automatic-only EOS 700 and 800 series cameras had not met consumer expectations. The EOS 1000 was marketed as the EOS Rebel in North America, a name which continued to see use for the majority of entry-level Canon SLRs and DSLRs.
1992 saw the introduction of the EOS 5, a replacement for the EOS 10. This camera introduced Canon's Eye-Controlled Focus (ECF) system, which saw further adoption across other cameras in the EOS series at the time. Four years later, Canon released the EOS IX, an APS-format SLR. The EOS line of film cameras continued to be iterated upon until the release of the EOS 300X in 2004, which was the last film-based SLR designed by Canon. The last EOS film SLR to end production was the EOS-1V, a professional film camera released in 2000; the camera was actively manufactured until 2018, though it continued to see official repair service until late 2025.
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Canon EOS
Canon EOS (Electro-Optical System) is a series of system cameras with autofocus capabilities produced by Canon Inc. The brand was introduced in 1987 with the Canon EOS 650, a single-lens reflex camera. All EOS cameras used 35 mm or APS-format film until Canon introduced the EOS D30, the company's first in-house digital single-lens reflex camera, in 2000. Since 2005, all newly announced EOS cameras have used digital image sensors rather than film, with EOS mirrorless cameras entering the product line in 2012. Since 2020, all newly announced EOS cameras have been mirrorless systems.
EOS cameras are primarily characterized by boxy black camera bodies with curved horizontal grips; the design language has remained largely unchanged since the brand's inception. The EOS series previously competed primarily with Nikon SLR cameras and as of September 2025[update] primarily competes with Sony mirrorless cameras. The series was conceived as a camera system built around autofocus capabilities.
The EOS series was introduced alongside the electrically-driven and autofocus-centered EF lens mount, which replaced the previous mechanically-driven and primarily manual-focus FD lens mount. The EF mount and its variants were the primary lens mounts for EOS cameras for decades, eventually being replaced by the RF lens mount in 2018, which was designed for mirrorless cameras and has now become the standard lens mount for EOS-branded cameras.
Canon first experimented with autofocus in 1985 with the T80, a single-lens reflex camera that utilized 135 film. The T80 featured Canon's existing FD lens mount, designed for manual focus, with the addition of electrical contacts that allowed communication between the camera body and focusing motors within the attached lens. This system, wherein the lens focuses itself using information from the camera body, was promising enough for Canon to continue development on a more refined version, despite Canon's internal dissatisfaction with the T80's autofocus performance when compared to Nikon and Minolta's autofocus cameras.
The EOS system was based on this principle and was introduced in 1987 with the Canon EOS 650. The camera broke compatibility with the FD lens mount by fully removing all mechanical linkages between the moving parts in the lens and in the camera: like the T80, the correct aperture and focus are determined by the camera body and transmitted electronically to the lens, which makes the required adjustments using internal motors. Canon named this new lens mount the EF mount, short for "Electro-Focus". Alongside the bayonet-style lens mount, the EOS 650 featured a new focusing sensor and a high-performance microprocessor, and was paired with lenses with ultrasonic motors—the first instance of this technology being used for consumer photography. According to Popular Mechanics, the EOS 650 and the improved EOS 620 had the fastest autofocus performance of any camera available in the year they were released.
In 1989, Canon released the first EOS camera marketed to professionals, the EOS-1. The camera was intended to compete with the Nikon F4 released one year prior. The EOS-1 was released in tandem with new professional-grade lenses for the EF mount and established the EOS-1 series of cameras.
The EOS 1000 followed in 1990; this became the EOS line's first successful budget SLR, as Canon's previous attempts with the automatic-only EOS 700 and 800 series cameras had not met consumer expectations. The EOS 1000 was marketed as the EOS Rebel in North America, a name which continued to see use for the majority of entry-level Canon SLRs and DSLRs.
1992 saw the introduction of the EOS 5, a replacement for the EOS 10. This camera introduced Canon's Eye-Controlled Focus (ECF) system, which saw further adoption across other cameras in the EOS series at the time. Four years later, Canon released the EOS IX, an APS-format SLR. The EOS line of film cameras continued to be iterated upon until the release of the EOS 300X in 2004, which was the last film-based SLR designed by Canon. The last EOS film SLR to end production was the EOS-1V, a professional film camera released in 2000; the camera was actively manufactured until 2018, though it continued to see official repair service until late 2025.