Ken Ross

No problem marty, will do.
Uploading to Youtube now.
It's hard to believe that the lens could make all the difference I'm seeing between Max's video and mine.
Zmarty, here ya go. Give it a bit of time to upgrade to 4K. It's now a low rez, but you should still see the focus.
 

"GH5 beats a7S, a7R II, GH4, E-M1 II, X-T2 & X-T20 (Low-light High ISO Video Quality Review Test)"

Man, read the last pages: this is previous week news. Sorry, but you know how news run fast these days... ;-)
This kind of reports on bad AF performance reminds me when people want to mimic Hollywood from default settings on their Walmart camera :-D

Wow. Nice auto focus.

What is? The video I just posted shows quick & largely accurate AF.
I've wondered that too. I've only been using the 14-140 lens and have never gotten his results. However I wouldn't rule out a bad body either as other GH5 owners on his website have suggested.

So here's the video I promised. I tried to duplicate Max's AF scenario as best I could. None of these clips have been edited and none that I shot were left out. Everything you see is everything I shot. Very different results. What can I say? As I've said before, these results are extremely typical for everything I've shot thus far. I've never shot a single clip that even remotely resembles what Max got.
 

No problem marty, will do.
Uploading to Youtube now.
It's hard to believe that the lens could make all the difference I'm seeing between Max's video and mine.
Zmarty, here ya go. Give it a bit of time to upgrade to 4K. It's now a low rez, but you should still see the focus.
 

No problem marty, will do.
Uploading to Youtube now.
It's hard to believe that the lens could make all the difference I'm seeing between Max's video and mine.
Zmarty, here ya go. Give it a bit of time to upgrade to 4K. It's now a low rez, but you should still see the focus.
 

So here's the video I promised. I tried to duplicate Max's AF scenario as best I could. None of these clips have been edited and none that I shot were left out. Everything you see is everything I shot. Very different results. What can I say? As I've said before, these results are extremely typical for everything I've shot thus far. I've never shot a single clip that even remotely resembles what Max got.
 

Agreed Ken....but because of the lower contrast indoors to my eye the GH5 pulled focus rather seamlessly...speaking of pulling focus...wont have my GH5 for a couple of months but already have the Leica 12-60 because of this capability in the GH5...for narrative work, whether commercial product shots, or feature or television, just one of the examples of how ahead of the curve they are with the GH5!
PS is that the Panny 12-60 in the AF demo?...and do you like it?

No problem marty, will do.
Uploading to Youtube now.
It's hard to believe that the lens could make all the difference I'm seeing between Max's video and mine.
Zmarty, here ya go. Give it a bit of time to upgrade to 4K. It's now a low rez, but you should still see the focus.
 

So here's the video I promised. I tried to duplicate Max's AF scenario as best I could. None of these clips have been edited and none that I shot were left out. Everything you see is everything I shot. Very different results. What can I say? As I've said before, these results are extremely typical for everything I've shot thus far. I've never shot a single clip that even remotely resembles what Max got.
 

No problem marty, will do.
Uploading to Youtube now.
It's hard to believe that the lens could make all the difference I'm seeing between Max's video and mine.
Zmarty, here ya go. Give it a bit of time to upgrade to 4K. It's now a low rez, but you should still see the focus.
 

No problem marty, will do.
Uploading to Youtube now.
It's hard to believe that the lens could make all the difference I'm seeing between Max's video and mine.
Zmarty, here ya go. Give it a bit of time to upgrade to 4K. It's now a low rez, but you should still see the focus.
 

So here's the video I promised. I tried to duplicate Max's AF scenario as best I could. None of these clips have been edited and none that I shot were left out. Everything you see is everything I shot. Very different results. What can I say? As I've said before, these results are extremely typical for everything I've shot thus far. I've never shot a single clip that even remotely resembles what Max got.
 

Holly crap, that is just awesome. No one could even begin to focus that fast in manual mode. Camera envy on my part. What lens, 12-35mm, 12-60mm?? The 14-140mm, no way? If so what version?

I thought I saw one little spec of dust around the Bananas, but I was wrong LoL. The heck with the camera, I want your House! Nice video. Shows it's strengths for sure. Looks like yours works.

Thanks Fritz. This is the first day we've had some sun in a while and after watching Max's video, I decided I'd go out and shoot some clips that duplicated one of his failed tests. I will put this video together and you'll see how totally different our cameras behave. No comparison whatsoever.
It's such a pity this camera is getting such a bad rap for, what I think, is an obviously defective unit.

Thanks Fritz. This is the first day we've had some sun in a while and after watching Max's video, I decided I'd go out and shoot some clips that duplicated one of his failed tests. I will put this video together and you'll see how totally different our cameras behave. No comparison whatsoever.
It's such a pity this camera is getting such a bad rap for, what I think, is an obviously defective unit.

Hi Ken...that looks really good!...and Max's test actually looks much worse than AF on the GH4...I would say it's probably his camera body...I won't get mine for about 2 months as it has to be brought to me from the US...I specifically bought  from a small dealer though, and they agreed they would unbox the camera and test the basics like LCD screen, IBS,AF etc. to make sure the camera functions properly before shipping...the option of shipping it back does not exist for me...I did have to authorize opening the box in writing though...with the very large volume of GH5's shipping, and it being a technically and feature wise extremely advanced camera, one can certainly expect some glitches in some bodies...lastly...I'm glad Panasonic ignores the fanboy hate threads and whining and nitpicking that always seem to accompany GH cameras and seem to continue to strive for excellence in the GH cameras they release every few years...

That's what I don't get. His are the absolute worst results I've seen. I wonder if he doesn't overthink the AF. I have it on central area focusing, the default area size (the AF has been so good I'm terrified to touch anything!) and the camera has shown minimal hunting and stays locked on the target. Now granted I don't have people running toward or away from the camera since that's not what I typically shoot. 
However in my tests, I have shot subjects/objects close to the lens and then immediately changed my focus point to something 10-20' away. I've walked around the house while shooting at varying distances. Results have been quick and sure-footed. I'll upload a test I did last night for a friend.
i doubt the AF of my 14-140 is so exceptional so as to explain why I've had no issues. BTW, I didn't even watch his 2nd AF video, but I will later today.

Are your Sigma and XL Canon or Nikon mount? If Nikon, what values are you entering in the camera for focal length? Remember that you need to enter the effective focal length of the lens and booster together.
Even with the correct value, though, you can't expect IBIS to absorb walking motions. Not even big expensive gimbals or Steadicam can do that. Which is why steadi/gimbal operators have to learn the "duck walk".
The GH5's USB port doesn't support external charging/power. You would have to use a dummy battery. A big old NP-F battery is going to weigh nearly as much as the battery grip anyways, might as well do the grip and then you can hot-swap batteries.

I did a small edit in my post only to point out I don't necessarily think this "reviewer" has an agenda, as follows his disclaimer in one of his messages BTW. Lots of interests command internet marketing, though. That's for sure! He is one of many others.
Even though, his first test was pretty incomplete and very distracted. This 2nd one as a reply to the lack of depth of the other one, has 30 minutes, so another ballpark. But, yes, he has forgotten to test a more complete approach using a more capable full technique any experienced shooter will use. Not by definition mandatory manual focus, as a lot of other users usually infer as dichotomy to AF. There are other AF modes such as tap to focus he simply didn't talk about. Or the way we can lock AF up just in order to prevent hunting, as for instance.
All this is part of the labor and these AF tests drive me nuts for their bewildering simplicity. I don't have anything against thousands of YT followers and they surely don't bother me at all, on the contrary, they led me to demand more from their input being one of them.

Max's gh5 or lens may have been buggy. I have seen much better AF by other youtubers

Jon, no, but I should have explained how I shot this to explain what you're seeing. As I moved to different spots in the mall, I was sitting in areas where there were arrays of 6 or so seats and a couch. My seat would generally be 12'-15' (I'm guessing) from my 'subject'.
These were obviously candid shots (technically you're not supposed to shoot in the mall) and I wanted to be as discreet as possible. So I had the camera on my thigh with my legs crossed and the VF swung out so that I could look down, not appearing to be shooting. I was probably 3/4 zoomed in with the 14-140 lens, while I'd make slight adjustments with my leg and camera for relatively consistent framing...a really lousy monopod. That resulted in those slight movements that would not have occurred with the camera to my eye, as I almost always shoot hand-held. 
So that's the long winded answer to the jitter question. I wasn't even careful in adjusting exposure since it was hard to see the zebras in the LCD (I wear reading glasses). I'll look out for it though in my normal shooting style. 
My impression of the GH5 IBIS is that it's a bit more effective than in the G85. I think that's more a function of the size and weight (bigger cams are generally easier to hold steady) than an actual improvement in the IBIS.