To the OP: if you had to rate AF-C in video mode in both the RX100IV and the GX85, could you give me an estimate of how good you think it is, 1-10 scale?
I haven't had a chance to test the GX85 in the conditions we typically film in (indoors with average to poor lighting from arcade machines) but we're going to give it a test run this weekend!
Right now I can say that both perform reasonably well, but they "feel" very different. The Sony tends to pop things into focus really quickly, whereas the Panasonic likes to focus more gradually and smoothly - more of a film/cinematic effect. We've had plenty of experiences with the Sony refusing to focus on various objects and items though.
The Sony probably beats the Panasonic when it comes to faster moving situations, but the Panasonic didn't have any issues with focus when I filmed clips at the zoo. I would give both of them a 7 to 8 for now! I still need to learn all the different settings that the Panasonic has to offer, so I will post up more thoughts when I get more experience with the camera.
That´s a very nice reply, thank you.
About the Sony´s "quick" vs Pana´s "smooth" AF, smooth is good, but I´m worried about the Pana taking an unusually long time to refocus, showing that kind of "blurred mess" I´ve seen in the past. Focus hunting is also an issue I´m concerned with.
And about the Sony "refusing to focus", I do know it´s still far from perfect (I hear it´s slightly improved over the RX100III, which took a lot of flack for this very reason) but I somehow suspect it´s still going to be a bit more "reliable" for people like me, who are mostly interested in taking videos handheld, and for whom AF-C in video mode is even more important than the very promising stabilzation the GX85 is showing.
So please, keep us updated with your new findings as soon as you do some more tests.
Thanks mate!