Originally posted by i83N I never will too, just want to know curent technology achievements in photography.
To achieve decent AF with a Dslr lens you need phase detect AF (the ability to detect direction required to focus).
Afain all current Sony/toshiba sensor 3rd party implementations do not have hybrid AF capability therefore all Nikon/Pentax cannot focus quickly in Video mode as the sensor is CD only.
Sony use a translucent screen so do not need to remove the 'mirror' during live capture so PD is available in their dslr's and Canon have on chip hybrid AF.
So for video with full time AF (consumer IQ) Sony and Canon have the best solutions, But with Canon you need to ensure your model supports hybrid AF.