The addition of changed the game for the 5D series. By splitting every pixel on the 30.4MP sensor into two photodiodes, the camera can calculate distance and focus instantly without the "hunting" common in older contrast-detection systems. Canon Autofocus Series: Dual Pixel CMOS AF
This system takes over when you switch to Live View or Video mode. It uses the camera's image sensor to perform phase-detection autofocus across approximately 80% of the frame, allowing for smooth, continuous tracking that was previously impossible on full-frame DSLRs. Viewfinder Focus: The 61-Point Powerhouse The viewfinder system in the 5D Mark IV focus canon 5d mark iv
The focus points cover a wider vertical area compared to the Mark III, giving you more freedom in composition without having to "focus and recompose". The addition of changed the game for the 5D series
The center AF point is sensitive down to -3 EV , meaning it can find focus in lighting conditions so dim that the human eye might struggle. Live View & Video: Dual Pixel CMOS AF It uses the camera's image sensor to perform
A major win for wildlife and sports photographers is that all 61 points (including 21 cross-type) remain functional even when using lens and teleconverter combinations that result in a maximum aperture of f/8.