From Rangefinders to AI: The 50-Year Evolution of Autofocus Technology
Over the span of nearly five decades, autofocus technology has transitioned from manual rangefinders to advanced AI-based subject detection. The journey began with Luther George Simjian's patent for autofocus in 1931. In 1976, Leica presented the Correfot prototype, followed by the launch of the Konica C35 AF in 1977, marking the first successful autofocus camera. In the late 1970s, Polaroid introduced sonar autofocus with the SX-70. The Pentax ME-F (1981) and Nikon F3AF (1983) became the inaugural autofocus 35mm SLRs. In 1985, the Minolta Maxxum 7000 combined autofocus with autoexposure, and Canon's EOS system was introduced in 1987. Today, modern autofocus employs face and subject recognition, utilizing advanced motors and algorithms for precise motion prediction.
Key facts
- First autofocus patent filed by Luther George Simjian in 1931.
- Leica Correfot prototype shown at Photokina 1976.
- Konica C35 AF (1977) first commercially successful autofocus camera.
- Polaroid SX-70 Sonar OneStep used ultrasonic sonar autofocus.
- Pentax ME-F (1981) first autofocus 35mm SLR.
- Minolta Maxxum 7000 (1985) integrated autofocus system.
- Canon EOS system (1987) with fully electronic EF mount.
- Fujifilm FinePix F300EXR (2010) first camera with on-sensor phase detection.
- Canon Dual Pixel CMOS AF introduced in 2013 with EOS 70D.
- Modern AF uses machine learning for subject recognition including humans, animals, birds, and vehicles.
Entities
Artists
- Luther George Simjian
Institutions
- Leica
- Konica
- Honeywell
- Polaroid
- Pentax
- Nikon
- Minolta
- Canon
- Fujifilm
- Sony
- Panasonic
- Samsung
- Aptina
- Sigma
- Tamron
- Petapixel