GH4 GH5 AF: request for a test (for checking accuracy, speed, smoothness and hunting)

[Emanuel]

I had posted somewhere else, but I guess this is worthy of its proper place, so here we go. No GH5 here yet. Anyone available to perform this test?

I've arrived to the conclusion tap-to-focus is the best way to safely go forward on 4K AF video, so I've requested to camera owners to check it out. It is part of AF system and maybe a good solution to overcome eventual limitations. In any case, I guess the reviewers highlighted on the current hype out there may end short as actually their findings did. So feel free to extend your testing on the AF system as a whole it is also.

Do you mind to check this and try it with your GH5? Please read the following information on touch to focus I gathered with:

1)
A) (from minute 0:37 on) https://youtu.be/tjSviTxLLqY?t=37
B) (from minute 7:39 on) https://youtu.be/AEsSsdTKJs4?t=459

Fastest settings tested ain't anything helping to prevent the hunting hence pulsing, so please test all slower ones available as well. Not only continuous focus is the most wanted method.

2)
http://www.eoshd.com/comments/topic...ll-is-revealed/?do=findComment&comment=189260
http://www.eoshd.com/comments/topic...ll-is-revealed/?do=findComment&comment=189282

3)
(from minute 13:23 on) https://youtu.be/BAuEmp3fKQI?t=803
(from minute 41:23 on) https://youtu.be/WSAc3hU1v3k?t=2483

But not prone to introduce hunting (as will likely happen with fast settings) !

4)
http://www.dvxuser.com/V6/showthrea...s-Test&p=1986693286&viewfull=1#post1986693286

I guess different settings and distinct setups will get rid of the issue. Seems 4K/60p or/and external recording helps, so why not too if we're looking for the best automatic or semi-automatic focus setup to work out?

 

[Ianscreations]

This may answer some of your questions? This is a very specific autofocus test for my own needs. I did one for the single situation where I utilize autofocus on a regular basis: wedding processionals. https://www.youtube.com/watch?v=rZrBLYFGs9A

 

[Emanuel]

Thank you for your post. Also posted here: http://www.eoshd.com/comments/topic/24076-gh5-focus-excellence/?do=findComment&comment=190677

Have you also tested tap to focus in order to correct AF? Or then, in manual focus?

Max Yuryev has tested it but from the fastest settings, I'm afraid it will very likely be prone to introduce hunting:

(from minute 7:39 on) https://youtu.be/AEsSsdTKJs4?t=459

It would be interesting to check it out from slower or even from the slowest settings as much complete as your testing

 

[Emanuel]

It might be interesting to see it under distinct backgrounds and setups, low light, etc. In any case, this is fairly helpful:

[Focus Pulling in both modes: Touchscreen & Focus Transition]

https://www.youtube.com/watch?v=Dpec03JocuE&lc=z125ixbpivbtsvptw23jjznhrmu2zfggb04.1492093607236256

"i was using the continuous af to tap to focus, i was using the pany 12-35mm 2.8 at f2.8, the 15-20 times i tapped back and fourth i didnt notice any hunting"