This is significant because Canon 5D Mark iv has one of the best focusing technologies for fast action.e

After shooting Canon DSLRs for over 20 years and investing a lot in Canon lenses, I decided to try the a7r III after reading reviews that said it now had one of the best focus systems available and Sony was making very good lenses.

On the A7riii... you get absolutely perfect focus more often

Incredible high performance razor sharp auto focus

This is an amazing feature -- even with very narrow depth of field (blurring background), you will get absolutely perfect focus on the eyeball in almost every portrait/person shot.

With a7r3, i don't have to worry about that at all - mirrorless bodies with combination of phase and contrast detect points always find the right focus

Works great, iso is amazing real fast focus excellent battery life outstanding camera you won't regretted

With Canon, manual focusing is painful because unlike Sony, you don't have access to any

Love the auto-focus, a lot of custom buttons on body, iso performance and dynamic range of the camera