In a somewhat related post to the last one that discusses double tap to wake on 720 devices and under, here are some videos showing Nokia Pro Cam on the 620, 820. Pro Cam is said to currently work on the 9xx and above only due to some hardware limitations.
If you want to, there should be a work around on how to get pro-cam, though it just might not work as well as advertised. Perhaps if Nokia just openly said that it’s there to differentiate their more premium models? Should all Lumias (WP8s) have ProCam or should it just be for the 9xx and above? (BTW I think the work around is to trick the store into thinking your handset is 9XX and above. No particular firmwares necessary).
ammad found this first video demoing pro cam on the 620.