23fbaf81_ess___Photographically_Curious__Mirrorless
[Overall] Face recognition [SLR] Not possible. [Mirrorless] 
Works very well. Focuses on the eyes of a person and can give preference to “registered” faces, to the left or right eye or to the eye which is closer to the camera.
SLR vs. Mirrorless | Photographically Curious
Mirrorless