The "Dual Pixel CMOS AF" developed by Canon is an innovative image-plane phase-difference AF technology that employs a CMOS sensor on which all of the effective pixels are able to perform both imaging and phase-difference AF. Each individual pixel (the smallest structural unit capable of outputting an image signal) on the CMOS sensor incorporates two independent photodiodes (elements that transform light into electrical signals) which output signals that can be used for both imaging and the phase-difference AF.
When using the Live View function, the technology makes possible shooting with a feel similar to when shooting through the viewfinder, enabling sharp focus to be obtained across a wide shooting area through phase-difference AF until final focus is achieved.
Compared with previous image-plane phase-difference AF technology, the "Dual Pixel CMOS AF" realizes shorter focusing times, delivers exceptionally Movie Servo AF tracking for continuously smooth focusing during movie shooting, even when filming quickly moving subjects.
How “Dual Pixel CMOS AF” works
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| Here is the list of EF/EF-S lenses which can take advantage of Dual Pixel CMOS AF | |||
| Prime Lens | Zoom Lens | Macro Lens | EF-S Lens |
| EF 14mm f/2.8L II USM | EF 8-15mm f/4L Fisheye USM | EF 50mm f/2.5 Compact Macro | EF-S 60mm f/2.8 Macro USM |
| EF 15mm f/2.8 Fisheye | EF 16-35mm f/2.8L II USM | EF 100mm f/2.8 Macro USM | EF-S 10-18mm f/4.5-5.6 IS STM |
| EF 20mm f/2.8 USM | EF 16-35mm f/4L IS USM | EF 100mm f/2.8L Macro IS USM | EF-S 10-22mm f/3.5-4.5 USM |
| EF 24mm f/1.4L II USM | EF 17-40mm f/4L USM | EF 180mm f/3.5L Macro USM | EF-S 15-85mm f/3.5-5.6 IS USM |
| EF 24mm f/2.8 | EF 20-35mm f/3.5-4.5 USM | EF-S 17-55mm f/2.8 IS USM | |
| EF 24mm f/2.8 IS USM | EF 22-55mm f/4-5.6 USM | EF-S 17-85mm f/4-5.6 IS USM | |
| EF 28mm f/1.8 USM | EF 24-70mm f/2.8L USM | EF-S 18-55mm f/3.5-5.6 | |
| EF 28mm f/2.8 | EF 24-70mm f/2.8L II USM | EF-S 18-55mm f/3.5-5.6 II | |
| EF 28mm f/2.8 IS USM | EF 24-70mm f/4L IS USM | EF-S 18-55mm f/3.5-5.6 USM | |
| EF 35mm f/1.4L USM | EF 24-105mm f/4L IS USM | EF-S 18-55mm f/3.5-5.6 II USM | |
| EF 35mm f/2 | EF 28-90mm f/4-5.6 | EF-S 18-55mm f/3.5-5.6 III | |
| EF 35mm f/2 IS USM | EF 28-90mm f/4-5.6 USM | EF-S 18-55mm f/3.5-5.6 IS | |
| EF 40mm f/2.8 STM | EF 28-90mm f/4-5.6 II | EF-S 18-55mm f/3.5-5.6 IS II | |
| EF 50mm f/1.0L USM | EF 28-90mm f/4-5.6 II USM | EF-S 18-135mm f/3.5-5.6 IS | |
| EF 50mm f/1.2L USM | EF 28-90mm f/4-5.6 III | EF-S 18-55mm f/3.5-5.6 IS STM | |
| EF 50mm f/1.4 USM | EF 28-135mm f/3.5-5.6 IS USM | EF-S 18-135mm f/3.5-5.6 IS STM | |
| EF 50mm f/1.8 | EF 28-200mm f/3.5-5.6 | EF-S 18-200mm f/3.5-5.6 IS | |
| EF 50mm f/1.8 II | EF 28-200mm f/3.5-5.6 USM | EF-S 55-250mm f/4-5.6 IS | |
| EF 85mm f/1.2L USM | EF 28-300mm f/3.5-5.6L IS USM | EF-S 55-250mm f/4-5.6 IS II | |
| EF 85mm f/1.2L II USM | EF 35-350mm f/3.5-5.6L USM | EF-S 55-250mm f/4-5.6 IS STM | |
| EF 85mm f/1.8 USM | EF 38-76mm f/4.5-5.6 | ||
| EF 100mm f/2 USM | EF 55-200mm f/4.5-5.6 USM | ||
| EF 135mm f/2L USM | EF 55-200mm f/4.5-5.6 II USM | ||
| EF 135mm f/2.8 Soft Focus | EF 70-200mm f/2.8L USM | ||
| EF 200mm f/1.8L USM | EF 70-200mm f/2.8L IS USM | ||
| EF 200mm f/2L IS USM | EF 70-200mm f/2.8L IS II USM | ||
| EF 200mm f/2.8L USM | EF 70-200mm f/4L USM | ||
| EF 200mm f/2.8L II USM | EF 70-200mm f/4L IS USM | ||
| EF 300mm f/2.8L USM | EF 70-300mm f/4-5.6 IS USM | ||
| EF 300mm f/2.8L IS USM | EF 70-300mm f/4-5.6L IS USM | ||
| EF 300mm f/2.8L IS II USM | EF 70-300mm f/4.5-5.6 DO IS USM | ||
| EF 300mm f/4L USM | EF 75-300mm f/4-5.6 USM | ||
| EF 300mm f/4L IS USM | EF 75-300mm f/4-5.6 II | ||
| EF 400mm f/2.8L II USM | EF 75-300mm f/4-5.6 II USM | ||
| EF 400mm f/2.8L IS USM | EF 75-300mm f/4-5.6 III | ||
| EF 400mm f/2.8L IS II USM | EF 75-300mm f/4-5.6 III USM | ||
| EF 400mm f/4 DO IS USM | EF 75-300mm f/4-5.6 IS USM | ||
| EF 400mm f/5.6L USM | EF 100-400mm f/4.5-5.6L IS USM | ||
| EF 500mm f/4L IS USM | EF 200-400mm f/4L IS USM Extender 1.4× | ||
| EF 500mm f/4L IS II USM | |||
| EF 600mm f/4L IS USM | |||
| EF 600mm f/4L IS II USM | |||
| EF 800mm f/5.6L IS USM | |||