It’s a separate path, the sensor is under the camera (this allowed it to work with film). 2 sensors per autofocus point which it tries at align. It’s actually

It’s a separate path, the sensor is under the camera (this allowed it to work with film). 2 sensors per autofocus point which it tries at align. It’s actually kind ofvv be amazing it works. Gordy details, but the image helps see: https://photographylife.com/how-phase-detection-autofocus-works/amp https://photographylife.com/how-phase-detection-autofocus-wo... On camera sensor focusing was slightly different “contrast detection”. My understanding is modern cameras integrate those phase detection sensors on the image sensor itself. It might effect image quality but nobody notices and focus is fast and reliable. It’s tech that works well so generally nobody cares how it works. https://www.usa.canon.com/learning/training-articles/training-articles-list/canon-autofocus-series-dual-pixel-cmos-af-explained https://www.usa.canon.com/learning/training-articles/trainin...