@Jeremy Dulac - It's not so much the GH4 as it is the lens choice. Works on some lenses and not so good on other lenses. The lens on the RX10MK2 just works well but it could also be because it has a much smaller sensor. Large sensor cameras can achieve a shallow dof that small sensors can't. Maybe that's why it's easier to focus?

I was just curious if you could elaborate on why the adapter isnt as good on the gh4 or other cameras? What is it about the rx10 that makes it work better? Thanks!

@Rabby - Some cameras can do true 30 and 24, but If you want to be very technical it does 4K in 29.97 and in 23.98. Basically 30p and 24p. Like Canon DSLRs say 24, but it's really 23.98. This doesn't matter as much for most editing systems will make it work, but this information is necessary when using external recorders that can't auto detect the frame rate (like live switches, BlackMagic Design ATEM, etc.).

And if you want even better quality out of this camera you can record from the HDMI into an Atomos Shogun. It's still 8bit out, but the final codec and bitrate will be better.

Does the RX10 II shot 24p @ 4K, some one told me it doesn't only 30p. Is it true?

Thanks